In this task, you are given a question and a corresponding answer. Your task is to generate a fact statement that is useful in answering the given question.

[Q]: Question: If a species of plant or animal ceases to exist on earth, either by natural causes or by activities of humans, the loss of the plant or animal? Answer: cannot be undone.
[A]: if all members of a species cannot produce offspring then that species will likely become extinct


[Q]: Question: Which likely increased atmospheric CO2 recently? Answer: motorcycles.
[A]: carbon dioxide concentrations in the air have increased over the last decade dramatically


[Q]: Question: when fuel efficiency increases, gasoline use in cars will? Answer: decrease.
[A]:
as mileage per galon of gasoline increases , the amount of gasoline used will decrease