fact and question: wind is used for producing electricity
Question: People are switching from coal to wind to

What's the answer?

answer: producing heat for dwellings

fact and question: a pollutions standard is a kind of standard for reducing pollutants emitted by factories
Question: A clean air act must be followed by a

What's the answer?

answer: hard drive manufacturer

fact and question: tidal range is a measure of the vertical distance from high tide to low tide
Question: What needs measurements taken in the morning and evening?

What's the answer?

answer: tidal range

fact and question: planets orbit stars
Question: what do planets orbit?

What's the answer?

answer:
astral beings