Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Q: Seeds of a pine cone are easily carried by the wind and dispersed because seeds have wings.

A: Why are seeds of a pine cone easily carried by the wind and dispersed?
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Q: Demagnetization is the process in which a magnet loses its magnetic properties.

A: What is the process called in which a magnet loses its magnetic properties?
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Q: Primary pollutants enter the air directly.

A:
What type of pollutants enter the air directly?
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