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

Example Input: What is the tube-like device used to reliably measure lower levels of radiation?
Example Output: geiger counter

Example Input: Which theory describes the benzene molecule and other planar aromatic hydrocarbon molecules as hexagonal rings of sp2-hybridized carbon atoms with the unhybridized p orbital of each carbon atom perpendicular to the plane of the ring?
Example Output: valence bond theory

Example Input: Drip iirigation requires less water and reduces what?
Example Output:
salinization