ENVIRONMENT
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1- Habitat.<br />
2- Recycling.<br />
3- Ozone.<br />
4- Greenhouse effect.<br />
5- Paper.<br />
6- Extinction.<br />
7- Alternative energies.<br />
8- Wind.<br />
9- Acid rain.<br />
10- Pollutant.<br />
11- Hydro energy.<br />
12- Grizzly bear.<br />
13- Neither.<br />
14- Both.<br />
15- Carbon dioxide.<br />
16- Both.<br />
17- Wood.<br />
18- Using fóssil fuels.<br />
19- Both.<br />
20- Javan rhinoceros.<br />
21- Farmland.