Given a fact, create a question that can be answered using the fact. Construct the question such that it is unambiguous, has a unique answer and the answer can be given using the fact.

Example Input: Fact: if all members of a species cannot produce offspring then that species will likely become extinct
Example Output: Which is likely to disappear?

Example Input: Fact: plants are a source of fibers
Example Output: What are a source of fibers?

Example Input: Fact: humans discarding waste in an environment causes harm to that environment
Example Output:
Which has a positive impact on the environment in the world?