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DEPENDENCY RATIO:

Definitions ofDependency ratio on the Web:

In economics and geography the dependency ratio is an age-population ratio of thosetypically not in the labor force (the dependent part) and those typically in the labor force (theproductive part).en.wikipedia.org/wiki/Dependency_ratio The number of nonworking members compared to working members for a given populatiohighered.mcgraw-hill.com/sites/0070294267/student_view0/glossary_a-d.html the proportion of working (economically active) people to non-working (non-economicallyactive) people in a country by the formula:www.tuition.com.hk/geography/d.htm The ratio of the economically dependent part of the population to the productive part;

arbitrarily defined as the ratio of the elderly (those 65 years and over) plus the young (thoseunder 15 years of age) to the population in the "working ages" (those 15-64 years of age).www.coe.int/t/e/social_cohesion/population/demographic_year_book/2003_edition/03%20comarative%20tables/Glossary.asp An indicator used in population studies to measure the portion of the population that iseconomically dependent on active age group. ...

In published international statistics, the dependent part usually includes those under the age of 15 and over the age

of 64. The productive part makes up the population in between, ages 15 64. It is normally expressed as a

percentage:

(Total) DependencyRatio=_No of people aged 0-14 & those aged 65 & aboveNo of people aged 15 to 64

As the ratio increases there may be an increased burden on the productive part of the population to maintain theupbringing andpensions of the economically dependent. This results in direct impacts on financial expenditures o

things like social security, as well as many indirect consequences.

The (total) dependency ratio can be decomposed into the child dependency ratio and the aged dependency ratio[1]:

Child dependency Ratio = No of people aged 0 to 14

No of people aged 15 to 64

Aged dependency ratio= No of people aged 65 & above

No of people aged 15 to 64

XXXXXXXXXXXXXXX.

http://www.google.co.in/url?q=http://en.wikipedia.org/wiki/Dependency_ratio&sa=X&ei=fuReTI35Dov0vQP7hJWqAQ&ved=0CAwQpAMoAA&usg=AFQjCNHTfwfrTF42rs3zwLbvSm6owp-mrAhttp://www.google.co.in/url?q=http://highered.mcgraw-hill.com/sites/0070294267/student_view0/glossary_a-d.html&sa=X&ei=fuReTI35Dov0vQP7hJWqAQ&ved=0CA0QpAMoAQ&usg=AFQjCNE-BztA99bse-yq9zYaFQQSAhA95whttp://www.google.co.in/url?q=http://www.tuition.com.hk/geography/d.htm&sa=X&ei=fuReTI35Dov0vQP7hJWqAQ&ved=0CA4QpAMoAg&usg=AFQjCNH6NDcYj13VvRtI135x9yFz7BLZ_Qhttp://www.google.co.in/url?q=http://www.coe.int/t/e/social_cohesion/population/demographic_year_book/2003_edition/03%2520comparative%2520tables/Glossary.asp&sa=X&ei=fuReTI35Dov0vQP7hJWqAQ&ved=0CA8QpAMoAw&usg=AFQjCNE7TyWKTAMGhFV5yPTUZ4md3msMNQhttp://www.google.co.in/url?q=http://www.coe.int/t/e/social_cohesion/population/demographic_year_book/2003_edition/03%2520comparative%2520tables/Glossary.asp&sa=X&ei=fuReTI35Dov0vQP7hJWqAQ&ved=0CA8QpAMoAw&usg=AFQjCNE7TyWKTAMGhFV5yPTUZ4md3msMNQhttp://en.wikipedia.org/wiki/Childhttp://en.wikipedia.org/wiki/Pensionhttp://en.wikipedia.org/wiki/Social_securityhttp://en.wikipedia.org/wiki/Dependency_ratio#cite_note-0%23cite_note-0http://www.google.co.in/url?q=http://highered.mcgraw-hill.com/sites/0070294267/student_view0/glossary_a-d.html&sa=X&ei=fuReTI35Dov0vQP7hJWqAQ&ved=0CA0QpAMoAQ&usg=AFQjCNE-BztA99bse-yq9zYaFQQSAhA95whttp://www.google.co.in/url?q=http://www.tuition.com.hk/geography/d.htm&sa=X&ei=fuReTI35Dov0vQP7hJWqAQ&ved=0CA4QpAMoAg&usg=AFQjCNH6NDcYj13VvRtI135x9yFz7BLZ_Qhttp://www.google.co.in/url?q=http://www.coe.int/t/e/social_cohesion/population/demographic_year_book/2003_edition/03%2520comparative%2520tables/Glossary.asp&sa=X&ei=fuReTI35Dov0vQP7hJWqAQ&ved=0CA8QpAMoAw&usg=AFQjCNE7TyWKTAMGhFV5yPTUZ4md3msMNQhttp://www.google.co.in/url?q=http://www.coe.int/t/e/social_cohesion/population/demographic_year_book/2003_edition/03%2520comparative%2520tables/Glossary.asp&sa=X&ei=fuReTI35Dov0vQP7hJWqAQ&ved=0CA8QpAMoAw&usg=AFQjCNE7TyWKTAMGhFV5yPTUZ4md3msMNQhttp://en.wikipedia.org/wiki/Childhttp://en.wikipedia.org/wiki/Pensionhttp://en.wikipedia.org/wiki/Social_securityhttp://en.wikipedia.org/wiki/Dependency_ratio#cite_note-0%23cite_note-0http://www.google.co.in/url?q=http://en.wikipedia.org/wiki/Dependency_ratio&sa=X&ei=fuReTI35Dov0vQP7hJWqAQ&ved=0CAwQpAMoAA&usg=AFQjCNHTfwfrTF42rs3zwLbvSm6owp-mrA

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How migration influence Urban environment{Book Pg-43(I-15)}

Rural migrants are attracted by the possibilities that cities can offer, but often settle in shanty townsand experienc

extreme poverty. In the 1980s, this was attempted to be tackled with the urban bias theory which was promoted by

Michael Lipton who wrote: "...the most important class conflict in the poor countries of the world today is notbetween labour and capital. Nor is it between foreign and national interests. It is between rural classes and urban

classes. The rural sector contains most of the poverty and most of the low-cost sources of potential advance; but th

urban sector contains most of the articulateness, organization and power. So the urban classes have been able to wmost of the rounds of the struggle with the countryside..." [17]. Most of the urban poor in developing countries able

find work can spend their lives in insecure, poorly paid jobs. According to research by the Overseas Development

Institute pro-poor urbanisation will require labour intensive growth, supported by labour protection, flexible land

regulation and investments in basic services.' [18]

Rural Population which Migrated to Urban Areas

25% of the country's poor live in urban are31% of the urban population is poor

Traditional rural-urban migration exists in India as villagers seek to improve opportunities and lifestyles. In 1991, 39 million people migratein rural-urban patterns of which 54% were female. Caste and tribe systems complicate these population movements.

Seasonal urban migration is also evident throughout India in cities like Surant where many migrants move into the city during periods ofhardship and return to their native villages for events such as the harvest.

India as a nation has seen a high migration rate in recent years. Over 98 million people migrated from

one place to another in 1990s, the highest for any decade since independence according to the 2001census details. However in 1970s migration was slowing down. The number of migrants during 1991-

2001 increased by about 22% over the previous decade an increase since 1951.

Apart from women migrating due to marriage, employment is the biggest reason for migration. Thenumber of job seekers among all migrants has increased by 45% over the previous decade. Nearly 14million people migrated from their place of birth in search of jobs. The overwhelming majority of these-

12 million was men.

Migrants have created pressure on others who are in same job market. While freedom to migrate within

the country is an enshrined right the uneven development, levels of desperation and other factors havecreated friction points. Most people migrate because of a combination of push and pull factors. Lack of

rural employment, fragmentation of land holdings and declining public investment in agriculture create acrisis for rural Indians. Urban areas and some rural areas with industrial development or high

agricultural production offer better prospects for jobs or self-employment.

Contrary to common perception the search for jobs is more often within the same state than in some

other state. About 9 million persons were intra-state migrants often within the district while 5 millionwent to other states. The intra-state figures include people moving from villages to nearby towns and

cities in search of better jobs. Over 5.7 million persons who moved in search of jobs migrated from ruralto urban areas. Another 4.5 million migrated within the rural areas looking for work.

Energy crisis

http://en.wikipedia.org/wiki/Slumhttp://en.wikipedia.org/wiki/Slumhttp://en.wikipedia.org/wiki/Michael_Liptonhttp://en.wikipedia.org/wiki/Urbanization#cite_note-16%23cite_note-16http://en.wikipedia.org/wiki/Urbanization#cite_note-16%23cite_note-16http://en.wikipedia.org/wiki/Overseas_Development_Institutehttp://en.wikipedia.org/wiki/Overseas_Development_Institutehttp://en.wikipedia.org/wiki/Urbanization#cite_note-17%23cite_note-17http://en.wikipedia.org/wiki/Slumhttp://en.wikipedia.org/wiki/Michael_Liptonhttp://en.wikipedia.org/wiki/Urbanization#cite_note-16%23cite_note-16http://en.wikipedia.org/wiki/Overseas_Development_Institutehttp://en.wikipedia.org/wiki/Overseas_Development_Institutehttp://en.wikipedia.org/wiki/Urbanization#cite_note-17%23cite_note-17

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An energy crisis is any greatbottleneck(or price rise) in the supply ofenergy resources to an economy. In popula

literature though, it often refers to one of the energy sources used at a certain time and place. Energy runs machinin factories, lights our cities and powers our vehicles. There has been an enormous increase in the demand for

energy as a rsult of industrial development and population growth. Supply of energy is, therefore, far less than theactual demand.

Causes

Market failure is possible when monopoly manipulation of markets occurs. A crisis can develop due to industrialactions like union organizedstrikes and government embargoes. The cause may be over-consumption, aging

infrastructure,choke point disruption or bottlenecks at oil refineries and port facilities that restrict fuel supply. An

emergency may emerge during unusually cold winters due to increased consumption of energy.

Pipeline failures and other accidents may cause minor interruptions to energy supplies. A crisis could possibly

emerge after infrastructure damage fromsevere weather. Attacks by terrorists ormilitia on important infrastructurare a possible problem for energy consumers, with a successful strike on a Middle Eastfacility potentially causing

global shortages. Political events, for example, when governments change due to regime change, monarchy collapmilitary occupation, and coup may disrupt oil and gas production and create shortages.

Future and alternative energy sources

In response to the petroleum crisis, the principles ofgreen energy andsustainable living movements gain populari

This has led to increasing interest in alternate power/fuel research such as fuel cell technology,liquid nitrogeneconomy, hydrogen fuel, methanol,biodiesel, Karrick process,solar energy,geothermal energy, tidal energy, wav

power, and wind energy, and fusion power. To date, only hydroelectricity and nuclear powerhave been significan

alternatives to fossil fuel.

Hydrogen gas is currently produced at a net energy loss from natural gas, which is also experiencing decliningproduction in North America and elsewhere. When not produced from natural gas, hydrogen still needs another

source of energy to create it, also at a loss during the process. This has led to hydrogen being regarded as a 'carrie

of energy, like electricity, rather than a 'source'. The unproven dehydrogenating process has also been suggested fthe use water as an energy source.

Efficiency mechanisms such asNegawatt powercan encourage significantly more effective use of current

generating capacity. It is a term used to describe the trading of increased efficiency, using consumption efficiency

increase available market supply rather than by increasing plant generation capacity. As such, it is ademand-side

opposed to asupply-side measure

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machines. A century later, the industrialized world's thirst for energy had increased tremendously. Petroleum and naturagas were exploited as versatile and high quality energy products, and soon joined coal as principal fuels. Fifty years latescientists tapped uranium to fuel nuclear reactors and provide atomic energy.

Today, cheap energy is the lifeblood of American society. But there is a dangerous dark side to relying on non-renewabl

resources like coal, oil, natural gas, or uranium to supply our growing energy demands. The supply of these fuels is

physically limited, and their use threatens our health and environment. Fears of global warming aside, burning fossil fue

releases chemicals and particulates that can cause cancer, brain and nerve damage, birth defects, lung injury, and

breathing problems. The toxic stew released by combusting hydrocarbons pollutes the air and water, and causes acid ra

and smog. Nuclear energy, once touted as "too cheap to meter," has never been economically successful when all costs

are factored in, and fear of disasters like the Chernobyl reactor melt-down have virtually shut the industry down in the

U.S. and Europe. Inexpensive and seemingly abundant nonrenewable energy fueled the twentieth century economy, but

geologists, climatologists, environmentalists, and many others are warning that the honeymoon may soon be over.

Coal is the most abundant of the carbon-based fossil fuels, but it is also a leading threat to human health and the

environment. Coal currently provides 24% of the world's primary energy requirements and, in 1999, generated 57% of

the electricity used in the U.S. Existing coal reserves may be large, but they won't last forever, and health and

environmental costs limit its potential as an acceptable fuel in the future. Burning coal currently accounts for 43% of all

annual global carbon emissions, about 2.7 billion tons.

The top ten most air-polluted cities in the worldnine in China, one in Indiaall use coal as a primary energy source.

Atmospheric scientists have tracked large dust clouds of particulates and sulfur from Asia to the United States' west coa

In the U.S., coal reserves surpass those of oil and natural gas by about two hundred years and can be mined domestica

but using coal simply because there is plenty of it would be a serious mistake. Air pollution, acid rain, greenhouse gas

emissions, and other health dangers associated with processing coal into electricity take their toll on countless peoplearound the world. Western governments rarely discuss "coal" and the "future" in the same sentence anymore, but burni

coal has become a global problem that respects no international boundaries.

Cheap and abundant oil is an intoxicating elixir that the world's industrial nations have guzzled down as if there is no

tomorrow. Petroleum currently accounts for 40% of the world's energy, but many geologists anticipate an oil supply cris

sometime within the next two decades when global demand will exceed supply. While some argue that huge deposits of

may lie undetected in far-off locations of the globe, experts point out that there is only so much crude in the world, and

industry has found about 90% of it. The world's burgeoning population is dependent on food grown with petroleum-base

fertilizers, cultivated by machines running on cheap fuel.

In 1950, the U.S. was producing half the world's oil. Fifty years later, we don't produce half our own oil. Domestic

production peaked in 1970. Originally, America was blessed with about 260 billion barrels; only one country, Saudi Arab

had more. Although the U.S. is now the world's third largest producer, about 65% of our known oil has been burned. It'

downhill from here. The U.S. has 4% of the world's people but slurps down 25% of the world's oil. If the Chinese annua

consumed oil at the same per capita rate as Americans, there would be none available for anyone else.

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Natural gas (methane) is being touted by energy providers as an abundant clean fuel for the twenty-first century. It is

forecast to be the fastest growing primary energy source, because it burns cleaner than coal or oil. But this resource is a

nonrenewable, and the Department of Energy states that the U.S. has only 3.5% of the world's total natural gas reserve

enough to last about sixty-five years. More than 70% of the world's proven natural gas reserves are located in the

politically risky Persian Gulf and former Soviet Union. After 2020, the bulk of the world's remaining supplies of both oil anatural gas will be centered there.

According to the Energy Information Administration, natural gas provides 27% of the energy used today. Similar to thei

consumption of oil, Americans consume more than their share of natural gas; in 1997, the U.S. used 28% of the world's

total production. Consumption in the U.S. and Canada is expected to grow 50% by 2020, enforced in part by the Clean

Act Amendments of 1990, which are designed to curb acid rain, toxic emissions, and urban air pollution. Compared to th

combustion of oil and coal, natural gas combustion is relatively benign as a contributor to air pollution. American troops

have already shed blood in the Middle East protecting our oil interests; relying on natural gas for a primary energy sour

has similar costs and risks.

Nuclear energy presents similar problems to those associated with non-renewable fossil fuels. The planet's supply of

uranium is limited, and mining the ore is hazardous to human health. Worse, the radioactive waste byproducts are a let

long-term danger to the environment. In 1999, nuclear energy provided about 17% of the world's electricity, but splittin

the atom to boil water is like using a chainsaw to cut butter. The health and environmental costs of using atomic energy

have become serious obstacles to the industry. Disposal of radioactive waste has proven to be a much greater problem

than originally estimated. Nuclear power does not contribute to air pollution and greenhouse gas emissions, but a good

solution to safely storing tons and tons of radioactive waste, a nuclear byproduct that remains dangerous to all life-form

for thousands of years, remains elusive.

In the 1950s and 1960s, atomic energy was hailed as an unlimited panacea to the pollution problems generated by foss

fuels, and destined to be so cheap that electric companies wouldn't even put meters on houses. Today, there is little

support among Americans and Europeans for fission nuclear energy. Nobody wants a nuclear reactor in their backyard,

frightening publicity regarding reactor meltdowns at Chernobyl and Three Mile Island has only reinforced these fears.

Health officials estimate that at least 4,365 people who took part in the Chernobyl cleanup have died in the Ukraine.

[Editor's note: These high figures are disputed by some experts.-EFM] The risk from nuclear power plants and nuclear-

waste disposal sites demands a vigilance and longevity of our social institutions that is unprecedented.

Coal, natural gas, and uranium are alternative non-renewable energy resources to cheap oil, but each has advantages a

limitations, and none is as versatile as petroleum. The replacement of oil will require a mix of energy sources, including

clean renewable energy such as solar and wind power. This adjustment will involve substantial reorganization of the

world's economic structure and significant lifestyle changes in the industrialized countries.

Economists like to point out that the world contains enormous caches of unconventional oil that can substitute for crude

as soon as the price becomes competitive. It is true that resources of heavy oil, tar sands, and shale deposits exist in la

quantities. But the industry will be hard-pressed for the time and money needed to ramp up production of unconvention

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oil quickly enough to forestall an economic crisis. Experts who point out the approaching end of Hydrocarbon Man are no

pessimists or alarmists; they are simply saying now is the time to plan, lest the end of cheap fossil fuels be an

unprecedented disaster in human history.

Renewable energy will play a major role in the energy industry of the twenty-first century and beyond. British Petroleum

Royal Dutch/Shell, and other companies are investing heavily in renewable sources of energy. Industry experts realize t

these alternative energy systems not only help reduce greenhouse gas emissions, but they predict that over the next ha

century, renewables may grow to supply half the world's energy. Successfully generating electricity by harnessing the

perpetual power of the Sun and wind is not only technologically feasible, it is already a reality. Solar power relies on the

energy produced by nuclear fusion in the Sun. This energy can be collected and converted in different ways, such as sim

water heating for domestic use or by the direct conversion of sunlight to electrical energy using mirrors, boilers, or

photovoltaic cells. The technology is improving and the economics are getting more competitive. Photovoltaic panels don

generate electricity at night, but they can be used to produce hydrogen in the daytime, which can then be stored.

Scientists and engineers are continually improving the efficiency of renewable energy systems. Humans have been

harnessing the wind for thousands of years, and are now cleanly producing electricity with it. Air flowing through turbine

or spinning blades generates power that can be used to pump water or generate electricity. Wind energy is now the wor

fastest growing energy source and has become one of the most rapidly expanding industries.

Wind power has some drawbacks; a "wind farm" requires extensive areal coverage to produce significant amounts of

energy, and bird fatalities have been a concern. The wind industry is modifying equipment to address this issue but also

points out that countless wild creatures are killed every year as part of the acquisition and distribution of conventional

energy sources.

Hydroelectric power is another source of renewable energy. Hydroelectric dams, however, are no longer considered

environmentally benign sources of power. Fisheries and other wildlife habitat have been severely impacted on many

dammed rivers. Most of the world's hydroelectric dams are historically recent, but all reservoirs eventually fill up and

require very expensive excavation to become useful again. At this time, most of the available locations for hydroelectric

dams in the U.S. are already developed.

Humans have been burning biomass materials since the dawn of time, and it is still the principal fuel used in many parts

the world. Incredibly, just 120 years ago, wood was the chief energy source in the U.S. But today's economy runs on oi

and despite significant government support, converting wood to alcohol, or corn to ethanol has proven neither economic

nor energy efficient. Researchers have recently discovered how to produce clean combustible gas from waste products

such as sewage and crop residue, but biomass gas will not soon replace petroleum as the fuel of choice.

Hydrogen has been touted as the fuel of the future. It is the most abundant element known in the universe and can be

burned cleanly as a fuel for vehicles with water as the main combustion byproduct. Hydrogen can also be fed into a fuel

cell, a battery-like device that generates heat and electricity. Using hydrogen instead of gasoline or diesel will significan

reduce the health hazards and medical costs associated with the exhaust from conventional internal combustion engines

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But the large-scale extraction of hydrogen from terrestrial resources such as water, coal, or natural gas requires a lot of

energy, which is currently produced by burning fossil fuels. Commercial hydrogen production is expensive and only shift

the pollution from vehicles back to the power plants. Producing hydrogen with solar power is the dream of

environmentalists and renewable energy proponents. If done successfully, hydrogen and electricity will eventually becom

society's primary energy carriers in the twenty-first century.

Geothermal energy left over from the original accretion radioactive decay seeps out slowly everywhere, everyday. In

certain areas, the geothermal gradient (increase in temperature with depth) is high enough to exploit for the generation

electricity. Another form of geothermal energy can be tapped from the planet's surface. Soil maintains a relatively const

temperature throughout the year and can be used with heat pumps to warm a building in winter or cool a dwelling in

summer. This form of energy can lessen the need for other power to maintain comfortable temperatures in buildings, bu

cannot be used to produce electricity.

Tides, waves, and the heat differential within the world's tropical oceans are potent sources of clean energy. Various

countries around the world are investing time and money into the technologies that may tap these renewable power

producers, but overcoming the obstacles inherent in these systems will be difficult. The media and industry claim that

renewable energies are not yet economically competitive with fossil fuels. Perhaps not, but when one considers the heal

and environmental costs associated with burning coal and oil, the price of renewable energy becomes more attractive. N

renewable energy system will single-handedly replace oil, but together they will become a very important part of the

energy mix of the future. Traditional renewable systems are a logical step in the transition to advanced alternative ener

sources such as cold fusion. Although scientists and engineers are working feverishly to overcome the various obstacles

associated with "new energy" technologies, society should not stand by quietly while researchers wait for a breakthroug

Burning petroleum is polluting our air and water, and the bulk of the world's reserves of cheap oil are concentrated in th

politically volatile Persian Gulf. Getting that oil will likely cost billions of dollars and possibly the lives of American soldie

Every year American's consume 25% of all the energy produced in the world, but that conspicuous consumption can't la

forever. To that end, the U.S. Department of Energy established the Renewable Energy Production Incentive (REPI) as p

of an integrated strategy in the Energy Policy Act of 1992. This act promotes increases in the generation and utilization

electricity from renewable energy sources and furthers the advances of renewable energy technologies. In 1996, the

Renewable Energy Policy Project released "The Environmental Imperative," a plan for the energy market to draw on

renewable energy to avoid the severe environmental impacts of the fossil fuel cycle. This plan outlines the environmenta

imperative for accelerating the use of renewable resources. It is important to realize that it usually takes thirty to forty

years to significantly shift fuel patterns and that using electricity as an alternative to oil will require a major adjustment

the American public. The window of opportunity to make this energy transition without a major economic disruption will

not be open for lon

Man In Harmony with Nature

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Taoism sees nature as our mother. Our relationship with her should be one of respect and care. Nature provide

us with everything we need. Once we abuse this relationship by taking more than we need and giving nothing

back, we can expect problems.

When we practise Tai Chi, we are learning to balance our inner energies through a focused, quiet mind and gentmovements. This begins with recognising and respecting the body-mind relationship. We must realise the

importance of good health and a balanced state of mind. Looking after ourselves involves self love and self

discipline. We need to pay attention to the signals of the body. We have to know when to rest and what to eat.

Once we neglect ourselves physically, emotionally, mentally and spiritually, our health and well being will suffer.

out of the question.we fail to look after ourselves, how will we be able to care for others? Caring for the

environment would be out of question.

In truth, we are not protecting Nature; Nature is protecting us. For example, trees and plants are necessary for

purification of our vital energy. When Nature graciously protects and serves human beings, it is our responsibilit

to reciprocate. the question.