Fitting a catalytic converter to a car can reduce the emissions of nitrogen oxides by up to 90 percent, but they are very expensive, and cause more carbon dioxide to be released, which contributes to the greenhouse effect.
Sulfur Dioxide emissions from power stations can be reduced before, during, or after combustion... displayed 300 characters
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All these methods for reducing acid gases are expensive, and have drawbacks, so laws have been passed to force businesses to use them. The best way to reduce them is not to use as much energy in the first place. By turning off the lights when you leave a room or not using a car for short trips, you can help reduce acid gases... displayed next 300 characters
Nitrogen oxides can cause acid rain. Catalytic converters are designed to reduce these last three emissions.
How it Works
Most new cars are equipped with what is called a three-way catalytic converter...
Low sulphur coal is available and natural gas burns with a very low sulphur emissions. Factories have devices called scrubbers, that spray emissions with lime, in the smokestacks, which neutralizes the acids before they get into the air...
However, over the past fifty years, production of carbon dioxide, nitrous oxide and methane has risen sharply, and a new type of chemical - the chlorofluorocarbon, or CFC - has been introduced as a refrigerant, solvent and aerosol propellant, but it is also a very powerful greenhouse gas, because it can trap a lot of radiation - one molecule of CFC is 12,000 to 16,000 times as effective at absorbing infra-red radiation as a molecule of carbon dixide...
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