| conserve | protect something important from harm or destruction |
| dispose of | get rid of by throwing away or giving or selling to someone else |
| preserve | maintain (something) in its original or existing state |
| excessive | more than is necessary, normal, or desirable |
| inaccessible | unable to be reached or entered |
| pollutant | a substance that pollutes something, especially water or the atmosphere |
| pollution | damage caused to water, air, etc. by harmful substances or waste |
| emission | he act of sending out gas, heat, light, etc |
| leak | (of a liquid or gas) to escape from a hole or crack in a pipe or container |
| contaminate | make (something) impure by exposure to or addition of a poisonous or polluting substance |
| discharge | allow (a liquid, gas, or other substance) to flow out from where it has been confined |
| prominent | important; famous. |
| deplete | to reduce something in size or amount, especially supplies of energy, money, etc |
| endangered | in danger of being harmed, lost, unsuccessful, etc |
| extinction | a situation in which something no longer exists |
| inflict | cause to be suffered by someone or something |
| migration | movement from one part of something to another |
| ecology | the relationships between the air, land, water, animals, plants, etc |
