Question

"Which phrase describes a human activity that could have a negative effect on this cycle?

(1)a decrease in the amount of sulfates given off by motor vehicles
(2)an increase in recycling programs for plastics and metals
(3)the continued deforestation and removal of forest resources
(4)development of programs to conserve wildlife"

Answer 1

I'm not 100% sure, but in my view the most suitable answer is (3)the continued deforestation and removal of forest resources.