Given a scientific question, generate a correct answer to it.

Input: Consider Input: What type of pollution comes from sewage, storm drains, septic tanks, boats, and runoff from yards?

Output: municipal

Input: Consider Input: What are kpa, atm, and mmhg measurement units for?

Output: pressure

Input: Consider Input: What 3 types of friction occur between solid surfaces?
Output: static, sliding, rolling