Definition: In this task, you are given a statement spoken by a politician in natural language. Your task is to generate the subject of the discussion for the given statement. The subject generated is not necessarily a part of the given input. Your answer should contain one or more words.
Input: A Cornell University research study concludes that ethanol generates a 29 percent energy loss, meaning it takes more than a gallon of gasoline to produce a gallon of ethanol.

environment