There really is only one side of an argument when dealing with facts. The world is round. To argue otherwise is nuts. Global warming is happening. Glaciers are melting. The cause can be debated but the vast majority of the worlds scientists have determined we are contributing to it. To me it's obscene to teach children an "other view" counter to scientific consensus. It's like requiring fisheries students to be taught that endangered fish are really just a long term natural cycle which will all work itself out without our help over time.