Selenium is a chemical that affects the water stream

Selenium is a chemical that affects the water stream. There are many chemicals that affect the Earth and it's organisms.a. Visit the Environment Protection Agency's website (epa.gov) and find "Chemicals and Toxics" under Environmental Topics to answer the following questions. Intro Environmental Science • go.osu.edu/enr2100

i. Choose at least three chemicals at random. Read about each chemical and explain where it is found and how it affects organisms, air, etc.

ii.Create one master list of all the chemicals you researched and categorize them as either hu-man caused or caused by natural events. Which list is longer, human-caused or nature-caused?

iii.Does human impact play a role in the creation of these chemicals? What actions could hu-mans take to decrease the development of these chemicals? What actions might you specifi-cally take to decrease the development of these chemicals?