Click on the website links below to see where I got all my information:
Oregon Fish and Wildlife: https://www.fws.gov/oregonfwo/promo.cfm?id=177175701
National Geographic: http://nationalgeographic.org/encyclopedia/endangered-species/
Oregon Zoo: http://www.oregonzoo.org/conserve/fighting-extinction-pacific-northwest
eSchool Today: http://eschooltoday.com/pollution/air-pollution/causes-of-air-pollution.html
FactMonster: http://www.factmonster.com/ipka/A0906938.html
10 things you can do at home: https://www.change.org/p/10-things-you-can-do-at-home-to-protect-endangered-species
National Geographic: http://nationalgeographic.org/encyclopedia/endangered-species/
Oregon Zoo: http://www.oregonzoo.org/conserve/fighting-extinction-pacific-northwest
eSchool Today: http://eschooltoday.com/pollution/air-pollution/causes-of-air-pollution.html
FactMonster: http://www.factmonster.com/ipka/A0906938.html
10 things you can do at home: https://www.change.org/p/10-things-you-can-do-at-home-to-protect-endangered-species