2. One attempting to influence others by scaring them with exaggerated claims regarding the potential threat posed by global warming.
3. One who talks about global warming as though it is a "fact" (i.e., scientists have "proven") that fluctuations in global temperatures are caused by the emission of carbon dioxide and other greenhouse gases that result from human actions.
It is a combination of the "warm" in "global warming" and the "alarm" in "alarmists."
Larry is a geologist who pretends to agree with the warmalarms around him because he wants to keep his job.
John Galt hates warmalarms.