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

Example Input: People stopped adding lead to gasoline because of environmental pollution.
Example Output: Why did people stop adding lead to gasoline?

Example Input: Activities that can reduce the effects of edema condition include exercises to keep the blood and lymph flowing through affected areas.
Example Output: Activities that can reduce the effects of what condition include exercises to keep the blood and lymph flowing through affected areas?

Example Input: You call the high and low points of transverse waves crests and troughs.
Example Output:
What do you call the high and low points of transverse waves?