"Physical changes occur when objects or substances undergo a change that does notchange their chemical composition. This contrasts with the concept of chemical change in which the composition of a substance changes or one or more substances combine or break up to form new substances."
Answer: 
Explanation:

Multiply by t on both sides.


Now divide by I to isolate t.


desertification, urbanization, and climate change(more carbon dioxide).
Answer:
The answer to your question is D