What's to reconcile?
I don't think the IPCC ever said global warming was more serious than nuclear war.
In "An open letter from David Suzuki" dated February 20, 2008, David Suzuki writes:
In 1988, participants at a major conference of atmosphere scientists in Toronto were so alarmed by the evidence that global warming was happening that they signed a news release calling global warming a threat to human survival second only to nuclear war
www.davidsuzuki.org/latestnews/dsfnews02200801.asp
Al Gore has been consistent:
Greenpeace:
Stephen Hawking:
Thursday, 18 January 2007
Climate change stands alongside the use of nuclear weapons as one of the greatest threats posed to the future of the world, the Cambridge cosmologist Stephen Hawking has said.
Professor Hawking said that we stand on the precipice of a second nuclear age and a period of exceptional climate change, both of which could destroy the planet as we know it.
He was speaking at the Royal Society in London yesterday at a conference organised by the Bulletin of Atomic Scientists which has decided to move the minute hand of its "Doomsday Clock" forward to five minutes to midnight to reflect the increased dangers faced by the world.
<snip>
"As we stand at the brink of a second nuclear age and a period of unprecedented climate change, scientists have a special responsibility, once again, to inform the public and to advise leaders about the perils that humanity faces," Professor Hawking said. "As scientists, we understand the dangers of nuclear weapons and their devastating effects, and we are learning how human activities and technologies are affecting climate systems in ways that may forever change life on Earth.
<snip>
http://www.independent.co.uk/environment/climate-change/hawking-warns-we-must-recognise-the-catastrophic-dangers-of-climate-change-432585.html