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


question:
Fact: Condoms make sex safe if they're not used incorrectly. 
Question: When aren't condoms safe?
answer:
When they're used incorrectly.


question:
Fact: The weight of the air can be determined with a barometer. 
Question: What does a barometer determine?
answer:

weight of air.