Answer:
A/D
Explanation:
D, Fertilizers put more sulfur in the ground than their should be.
A, fossil fuels, could also be the answer. When we combust fossil fuels we release the sulfur in them into the atmosphere when they should not be in the air.
I also believe the answer is A.
The Answer is C. stratosphere
The ecosystem will collapse and fail because every species are needed and play a role in the ecosystem.
