In this task, you are given a fact statement and question based on the fact. Your task is to generate the correct answer for the question. The answer needs to be generated using the context fact statement.

Fact: cutting down trees in a forest causes the number of trees to decrease in that forest. Question: cutting down trees in a forest causes the number of trees to decrease where?
timberland

Fact: oil is a source of gasoline. Question: Liz's 72 Mustang stopped on the highway because it had run out of fuel. What does she need?
A product derived from oil

Fact: a greenhouse is used to protect plants by keeping them warm. Question: If an environment experiences harsh climates?

ponds may dry up