Terms : Hide Images
| 6714985046 | sulfuric acid | primary acid in acid rain | 0 | |
| 6714986422 | sulfur dioxide | waste gas from burning coal | 1 | |
| 6714989186 | carbon dioxide | greenhouse gas from burning fossil fuels | 2 | |
| 6714990993 | pyrite | mineral in coal mines that forms sulfuric acid | 3 | |
| 6714993614 | primary treatment | removing large waste from sewage | 4 | |
| 6714996310 | secondary treatment | removing dissolved chemicals and bacteria from sewage | 5 | |
| 6714997887 | coliform | bacteria found in sewage | 6 | |
| 6714999415 | septic system | sewage disposal that happens at house | 7 | |
| 6715001189 | ozone | respiratory and plant irritant that is part of smog | 8 | |
| 6715003433 | inversion | traps smog close to ground | 9 | |
| 6715005702 | asbestos | causes lung cancer | 10 | |
| 6715005703 | radon | radioactive gas in the ground | 11 | |
| 6715005704 | mercury | metal released into environment from fossil fuel drilling and which bioaccumulates | 12 | |
| 6715009836 | lead | metal that causes nerve system damage | 13 | |
| 6715011530 | albedo | reflection of sunlight off of ice | 14 | |
| 6715013236 | rate of natural increase | crude birth rate - crude death rate | 15 | |
| 6715014274 | infant mortality | measure of quality of life | 16 | |
| 6715016229 | urbanization | movement of people to areas of high population density | 17 | |
| 6715019490 | nitrogen, phosphorus, and potassium | components of synthetic fertilizer | 18 | |
| 6715021231 | eutrophication | release of nutrients into water bodies | 19 | |
| 6715024690 | natural gas | clean burning fuel that is also a greenhouse gas | 20 | |
| 6715025959 | coal | dirtiest of the fossil fuels | 21 | |
| 6715027722 | photovoltaic cell | converts sunlight into electricity | 22 | |
| 6715027723 | turbine | generates electricity by spinning a magnet relative to coil of wire | 23 | |
| 6715031282 | dike | prevents ocean overflow | 24 | |
| 6715032671 | levee | prevents river overflowing banks | 25 | |
| 6715034256 | dam | blocks river flow | 26 | |
| 6715035613 | negative feedback | change causes system to counteract the change | 27 | |
| 6715036962 | lichen | pioneer species made of fungi and algae | 28 | |
| 6715038151 | secondary succession | forest regrows after a fire | 29 | |
| 6715039904 | controlled burn | prevents dry fuel from accumulating | 30 | |
| 6715042490 | NEPA | mandates environmental impact studies | 31 | |
| 6715044557 | 32 |
