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Environmental Issues

Tracy

Use Science Explorer: Environmental Science to find the terms and their definitions in order to solve the crossword puzzle.

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Across
1.a species that influences that survival of others within an ecosystem
4.anything in the environment used by people
9.began in 1872
11.many scientists believe that this factor has the greatest effect on tropical rain forest biodiversity
13.the role of an organism within a habitat
17.raising fish or other types of sealife for food
18.cutting all the trees in a specified area at once
19.Pacific yew tree
20.cutting only certain tree in a forest and leaving a mix of type and size behind
21.illegal killing or removal of wildlife from a habitat
Down
2.laws that protect individual species in the Unites States
3.the amount of renewable harvested resource tthat can be used without reducing future supply
5.ex. sunlight, wind, fresh water, trees
6.introducing these into a differing ecosystem can cause irreversible damage
7.the disappearance of a species from Earth
8.ex. coal, oil
9.can threaten biodiversity
10.has both economic and ecological value within a given ecosystem
12.biggest drawback is money
14.contamination of Earth's land, water, or air
15.may cause birth defects, or weaken/kill an organism
16.called protection of Earth's biodiversity in 1995

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