Which of the following events could increase Earth's temperature? Question 2 options:

A. a decrease in the relative percent of greenhouse gases

B. planting more trees

C. widespread removal of tropical forests

D. a reduction in the use of fossil fuels

The answer is C & A.

Hope this helped you out!^^

gas

explanation:

smoke is the matter of a gas

one negative thing it that it can kill water animals. another negative thing is it can cause the destruction of ecosystem. one way water pollution can be reduced is to conserve energy.