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| 5544527072 | Ozone-depleting chemicals (chemicals that thin out the protective stratospheric ozone layer) | CFC's (chlorofluorocarbons) and other chemicals like methyl bromide and trichloromethane | 0 | |
| 5544659839 | Montreal Protocol | Most successful international treaty to solve a global environmental problem (ozone-depletion) | 1 | |
| 5544687055 | Industrial Smog | Consists of particulate matter (dark soot), SO2, H2SO4 and occurs in or downwind of areas with lots of coal-burning power plants. | 2 | |
| 5544707457 | Photochemical smog | Red-brown air pollution that consists of NOx and O3 as well as other oxidants. It requires sunlight,, NOx, and VOC's for the O3 to be created. | 3 | |
| 5544714798 | Acid Precipitation | Economically, it can damage buildings/statues, harm fisheries, and cause crop damage. Ecologically, it can directly harm organisms, can leach dangerous metals from soil and rock that also harm organisms, and can leach nutrients from the soil. | 4 | |
| 5544733066 | Tropospheric ozone (O3) | A molecule that is a severe respiratory irritant and is harmful to plants. | 5 | |
| 5544765433 | Stratospheric ozone (O3) | A molecule that is formed when sunlight hits O2 at the lower part of the stratosphere. A layer of these helps to prevent the most dangerous UV rays from reaching Earth's surface and damaging cells (skin cancer, eye damage, algae death) | 6 | |
| 5544804245 | Electrostatic Precipitators | Removes particulate matter from coal-burning smoke stacks. | 7 | |
| 5544804246 | Wet Scrubber | Removes SOx and particulate matter from coal-burning smoke stacks. | 8 | |
| 5544807756 | Catalytic Converter | Decreases NOx, CO, and VOC's from vehicle exhaust (vehicles with internal combustion engines that run on gasoline or diesel fuel) | 9 | |
| 5545050735 | Developed countries | Biggest indoor air pollution problem here is Sick Building Syndrome | 10 | |
| 5545119953 | Developing countries | Biggest indoor air pollution problem here is particulate matter and other pollutants from inefficient wood-burning stoves to cook and heat the home with. | 11 | |
| 8089694869 | Formaldehyde | Is an additive to help preserve pressed wood (plywood, particle board, etc) products in new homes. Can also be added to some fabrics to make them crease-resistant. Known carcinogen. | 12 | |
| 8089694870 | Asbestos | it is materially mined from the earth that was added to materials like ceiling tiles and foam insulation to act as a flame-retardant. It can lead to lung problems and/or lung cancer if you breathe it in. | 13 | |
| 8121253883 | Sick Building Syndrome | a situation in which the occupants of a building experience acute health effects that appear to be linked to time spent in that building (often the result of indoor air pollutants) | 14 |
