pollution. air pollution what is air pollution? …air that contains harmful substances at unhealthy...
Post on 27-Dec-2015
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Where does air pollution come from?
1) Burning fossil fuels
* cars, factories
2) Thermal Inversion
* occurs due to heating
3) Natural events
Other ways to reduce pollution from cars…
1) Drive less
2) Car pool
3) More fuel efficient cars
4) More alternative fuel cars (ethanol, hydrogen, electric)
Smog (“smoke & fog”)
…air pollution in cities that reduces visibility
1) Caused by a chem. rxn with: sunlight & pollutants (from cars & industries mostly)
2) Cities in warmer regions are more likely to have smog
What causes acid rain?
1) Gases in the air chemically reacts with the water vapor or precipitation forming an acid.
***the gases come from burning fossil fuels
-gases like nitrogen oxide, sulfur dioxide, carbon monoxide, etc…
How does acid rain affect ecosystems?
1) Makes bodies of water more acidic.
* affects the organisms in the water.
2) Changes the pH of soil, causes problems for the plants.
Other problems caused by acid rain
Property damage:
*damages paint finishes (cars)
*erodes structures
*corrodes metals
Controlling acid rain
1) Eliminate / reduce pollution, mostly emissions from cars, factories, power plants.
2) International cooperation is needed
What is the Greenhouse Effect?
…a process where heat from the sun is trapped at the surface of Earth by gases in the atmosphere
What causes the Greenhouse Effect?
…the large amount of “greenhouse gases” put into the atmosphere by burning fossil fuels and other activities.
How has the temperature of Earth changed over time?
As CO2 levels have increased greatly over the last 100+ years, so has the average temperature on Earth.
Over thousands of years the pattern has been the same, increasing CO2 has caused in increase in temperature.
What changes may result from the Greenhouse Effect?
1) Hurricanes – more & stronger hurricanes due to increasing ocean temperatures.
2) Drought & flooding – more rain in areas that used to get very little & less rain in other areas.
3) Agriculture – areas that used for farming may change making those areas less useful.
4) Coastal flooding – polar ice melting, causes ocean levels to rise, flooding lower lying areas on the coast.
How can the Greenhouse Effect be reduced?
Reduce the amount of “greenhouse gases” in the atmosphere!
- less fossil fuel use
- reduce CFC’s
- stop deforestation
- plant more trees
Damage to the Ozone
1) CFC’s – (chlorofluorocarbons)
* found in refrigerants, aerosol propellants, making styrofoam
* new laws regulating them, so CFC’s are not really used anymore.
* CFC’s break up Ozone in the stratosphere
Preventing Ozone damage
1) CFC’s reduced / eliminated – The Montreal Protocol was signed by most industrialized countries, eliminated the production of CFC’s.
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