| A | B |
|---|
| air pollution | a change to the atmosphere that has harmful effects |
| emissions | solid particles and gases that are relased into the air |
| photochemical smog | thick, brownish haze formed when certain gases in the air react with sunlight and ozone |
| ozone | a form of oxygen created when gases react in the sunlight, a major chemical found in smog |
| temperature inversion | layer of warm air that prevents the rising air from escaping and taking the air pollution with it |
| acid rain | the rain that mixes with pollution and returns to Earth's surface and is more acidic than normal |
| ozone layer | a layer of the upper atmosphere about 30 kilometers above Earth's surface that protects us from the harmful UV rays of the sun |
| chlorofluorcarbons, CFC's | gases containing chlorine and fluorine (CFCs) that harm the ozone layer |
| global warming | belief that the increase in carbon dioxide will cause the average temperature of earth to rise |
| greenhouse effect | layers of greenhouse gases like CO2 trapping heat around the earth and warming the atmosphere, causes global warming |
| pollutants | particles such as ash, smoke and gases that are found in the air |
| toxic | poisonous to our system |
| nitrogen and sulfur oxide | produced by burning fossil fuels and mix with precipitation to cause acid rain |
| indoor pollution | smoke, dust, chemicals, pet hair |
| carbon monoxide, CO | colorless odorless gas fromed from incomplete burning of fossil fuels, poisonous |
| radon | radioactive colorless, odorless gas from certain rocks underground |
| ultraviolet radiation | dangerous rays from the sun that cause sunburn and cancer |
