US climate deniers call Paris summit 'a threat' to the world

Fundraising letter warns UN deal on climate change would spell an economic suicide for America

The godfather of climate denial has warned that a United Nations deal on global warming would spell "economic suicide" for America and a disaster to the world, according to a leaked fundraising letter.

In the rambling 13-page letter, Fred Singer, a retired rocket scientist who rejects the science underlining climate change, appeals for at least $425,000 (270,212) to stop what he called the "radical, economy-wrecking and sovereignty-destroying UN climate pact".