Write a correct answer to the given question based on its associated fact. Make sure that your answer is contained in the associated fact. Don't be creative and introduce any new word that is not mentioned in the associated fact! Remember that the associated fact has been rearranged to form the question. So, the correct answer words must lie within the associated fact. The correct answer can be a word, phrase, or even a sentence.

Fact: certain Steel products have a positive impact on the environment. 
Question: certain Steel products have a positive impact on what?
environment.

Fact: CPU time can be used as a clock. 
Question: What computer component can you use to measure time?
CPU.

Fact: carbon dioxide has a negative effect on the environment. 
Question: What affects the environment negatively?

carbon dioxide.