Fact 1: Cutting down trees has a negative impact on an ecosystem.

Fact 2: An ecosystem can be in a desert, a tropical jungle, an ocean or a pond.

Given the two facts above, answer the question "What type of impact does cutting down trees have on jungles?" with the following options: 
- dangerous
 - negative
 - uncontrolled
 - mechanical
 - unpredictable
 - growing
 - positive
 - Pollution


 

  negative       