From a global environmental standpoint, why should people in North America be concerned about rain forests in South America, Asia, and Africa?

A. Because they are sources of tax revenues
B. Because they are the habitats of exotic animals
C. Because they provide recreation
D. Because they help clean the earth's atmosphere

Question

From a global environmental standpoint, why should people in North America be concerned about rain forests in South America, Asia, and Africa?

 		A.	Because they are sources of tax revenues
 		B.	Because they are the habitats of exotic animals
 		C.	Because they provide recreation
 		D.	Because they help clean the earth's atmosphere

seb.cal · Answer

D. They are like a natural vaccuum cleaner for pollutants.