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: 61 percent of non-tea party Republicans actually agree...there is solid evidence the earth is warming, ...[but] 70 percent of tea partiers, contrarily, say there is no solid evidence the earth is warming.

environment