Fact 1: Conserving resources has a positive impact on the environment. Fact 2: Humans meet some needs and wants by using resources found in the natural environment. Given the two facts above, what effect has the existence of humans had on the environment?

(A). climate;
(B). Negative;
(C). Neutral;
(D). Positive;
(E). Smoking;
(F). It expands;
(G). sweating;
(H). None;
Answer:
(B).