| A | B |
|---|
| First line of sewage treatment | Primary |
| Second line of sewage treatment | Secondary |
| Final line of sewage treatment | Tertiary |
| Example of tertiary treatment | Ultra violet light |
| Chemical found in fertilizers and manure | Nitrates |
| Chemical used in pipes and pipe soldering | Lead |
| Chemical used in TVs and appliances | PCBs |
| Chemical used in pesticides | DDT |
| Chemical used in battery manufacturing | Mercury |
| Process where oxygen using bacteria breaks down waste | Mineralization |
| Activities inhibited by water pollution | Fishing, swimming |
| Ways to help save the environment | Donate money, get involved in local groups |
| When first Safe Water Drinking Act was passed | 1974 |
| When Safe Water Drinking Act was amended for the first time | 1986 |
| When Safe Water Drinking Act was amended for the second time | 1988 |
| Examples of ways that oil pollutes water | Tanker accidents, routine maitenence, natural causes |
| Treatment plants remove... | Solids and some dissolved wastes |
| Common polluting chemicals | PCBs, Mercury, Lead, DDT |
| Number of uses of mercury in industry | 3,000 |
| Effects of oil on wildlife | Coating surface of water, coat animal's face, suffocating fish |
| What river ignited | Cuyahoga River |
| Effects of pollution | Spread of disease, reduced recreational use, disruption of natural processes |
| Amount of United States water supplies that are contaminated | 80% |
| Number of manufacturing facilities that use freshwater to dispose of chemicals | 370,000 |
| Largest contributor to oil pollution | Runoff |
| Total average gallons(in millions) of oil that pollute the ecosystem | 706 |
| Percentage of wetlands that recharge and purify groundwater that have been destroyed | More than 50% |
| Nitrates cause... | Blood disorders |
| Mercury and lead cause... | Nervous disorders |
| DDT is | Toxic and alters human chromosomes |
| PCBs cause... | Liver and nerve damage, skin eruptions, vomiting, fever and diarrhea |
| What sewage causes when in drinking water | Dysentery, salmonellas, hepatitis |
