This story from The Press Association sums up the best policy on Global Warming in the first three paragraphs:
"It would be cheaper and more effective for the world to adapt to global warming rather than fight it, scientists have said.
The scientists - including Mike Hulme, the founding director of the Tyndall Centre for Climate Change Research at the University of East Anglia - accept the scientific consensus on the causes and effects of climate change, but differ on what to do about it.
Their view, which has caused them to be labelled "the new pariahs of global warming", is that the world should work to reduce hunger, storm damage and disease, rather than spending trillions of pounds trying to stabilise carbon dioxide levels across the planet."
These thnigs should be mankind's goal with or without Global Warming! What are the fears from Global Warming? Drought? Drought is not a function of weather; it's a function of bad water management and bad planning- heck, most of the third world doesn't have reliable water supplies now. It's one of mankind's greatest shames that there are billions of people without potable water. If we built the aqueducts, viaducts, canals, and where necessary, desalinization plants to serve the people who need it today, a one or two degree average temperature change would not be able to overwhelm the system.
What else? Famine? As I noted previously , the United Nations says enough food exists to end hunger today- not in some wistful future, today. All we need do is build the political trust and the distribution systems. Once such systems were in place, food would be routinely routed from places having bumper crops to places having bad crops. Once again, with such systems in place, Global Warming could not overwhelm it.
What else? Disease? It boggles the mind that the world tolerates millions dying from easily controlable diseases even without Global Warming. We have hot years now- in 2003 there was a heat wave that caused tens of thousands of deaths by heat stroke in Europe- but there were no malaria or encephalitis epidemics. We know how to control these things, and controling the CO2 in the atmosphere isn't the method.
If we cared about our fellow man today, we could worry less about Global Warming tomorrow.