PRESENTATION OUTLINE
Air Pollution
An increase in amount of trace gasses in average air.
-Greenhouse effect: happens when greenhouse gases like CO2 prevent radiation from leaving the atmosphere.
-Ozone gas absorbs ultraviolet rays from the sun, which protects us.
-Chlorofluorocarbons (CFCs) are pollutants that destroy the ozone layer.
-Chemicals emitted from fossil fuels enter the atmosphere, and returns to the earth in tiny acid droplets (acid deposition).
-Acid precipitation occurs when the chemicals dissolve in water before returning.
Los Angeles is the worst place in the U.S. for particulate concentrations
-Solid waste pollution is often disposed of via landfill or incineration.
-Hazardous waste (such as mercury and cyanides) is hard to dispose of.
If these toxins are not dealt with properly, water or air could be poisoned, and potentially cause cancer, mutations, or even death.
Water pollution not only endangers aquatic life, it also threatens the life of land animals and humans.
Point-source pollution: Enters water at a particular location
Nonpoint-source pollution: Comes from a large area (often larger quantities and harder to control)
Water-using manufacturers:
Use a lot of water to cool metal and wash food, etc.
Biochemical oxygen demand:
A measure of water pollution.
