In the article Sixteen Concerned Scientists: No Need to Panic About Global Warming, physicist Ivar Giaever is quotes the American Physical Society policy on global warming: 'The evidence is incontrovertible: Global warming is occurring. If no mitigating actions are taken, significant disruptions in the Earth's physical and ecological systems, social systems, security and human health are likely to occur. We must reduce emissions of greenhouse gases beginning now.'
His next quote is priceless and dead on:
"In the APS it is OK to discuss whether the mass of the proton changes over time and how a multi-universe behaves, but the evidence of global warming is incontrovertible?"