ozone layerdurres 2014

OZONE LAYER

The Ozone layer is a special type of oxygen around the earth. It protects the earth from ultaviolet radition wich comes from sun

The  Ozone layer refers to a region of Earth's stratosphere that absorbs most of the Sun's UV radiation

The ozone layer contains less than ten parts million of ozone, while the average ozone concentration in Earth's atmosphere as a whole is only about 0.6 parts million

Aerosol sprays and other chemicals destroy the ozone layer .

They have helped to make a huge hole it

Now to much ultraviolet radition enters the Earth’s atmosphere through the hole

Ultraviolet radition can cause skin cancer

WHAT DESTROYS THE OZONE LAYER ?

POLLUTION Is the introducion of

contaminations into the natural enviorment that cause adverse change.

Pollution can take the form of chemicials substance or energy , such as noise , heat or light

Health effects of pollution

AIR POLLUTION Air pollution is the introduction

of chemicals, particulates, biological materials, or other harmful materials into the Earth's atmosphere, possibly causing disease, death to humans, damage to other living organisms

An air pollutant is a substance in the air that can have adverse effects on humans and the ecosystem.

The substance can be solid particles, liquid droplets, or gases.

A pollutant can be of natural origin or man made.

Pollutants are classified as primary or secondary

Primary pollutants are usually produced from a process, such as from a volcanic eruption.

Secondary pollutants are not emitted directly  Ground level ozone  is a prominent example of a secondary pollutant

Water pollution Water pollution is the

contamination of water bodies (lakes ,rivers,sea)

Water pollution affects plants and organisms living in these bodies of water.

Water pollution occurs when pollutants are directly or indirectly discharged into water bodies without treatment to remove harmful compounds.

The specific contaminants leading to pollution in water include a wide spectrum of chemicals, pathogens, and physical or sensory changes such as elevated temperature and discoloration.

In almost all cases the effect is damaging not only to individual species and populations, but also to the natural biological communities.

LAND POLLUTION Land pollution is the

deterioration (destruction) of the earth’s land surfaces, often directly or indirectly as a result of man’s activities and their misuse of land resources.

There are different types of land pollution

Solid WasteThese include all the various kinds of rubbish we make at home, school, hospitals, market and work places. 

ChemicalsChemical and nuclear power plants produce waste materials that have to be stored somewhere. 

DeforestationHumans depend on trees for many things including life. Trees absorb carbon dioxide from the air and enrich the air with Oxygen, which is needed for life.

Deforestation

What is deforestation?

Deforestation is when humans remove or clear large areas of forest lands

Trees are cut down (deforestation) for many reasons includingTo be used, sold or exported as timber

To be used for farming purposes

To make room for human