Give pessimists the benefit of the doubt.

Comments on the importance of environmental health and the need for government to contribute now to prevent future catastrophe from global warming. View that the risks to humanity are overlooked so governments can deliver economic growth; Opinion that almost all the short-term predictions of scientists have come true, including carbon dioxide in the atmosphere and more frequent storms; View that environmentalists with pessimistic visions should be listened to and their warnings acted on by politicians.