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, answer the question "What effect has the existence of humans had on the environment?" with the following options: 
- climate
 - Negative
 - Neutral
 - Positive
 - Smoking
 - It expands
 - sweating
 - None


 

  Negative       