Associated Press: New York City under water … the Amazon rain forest baked by droughts and wildfires … Himalayan glaciers just a memory.Those could be some of the devastating consequences of an increase in the average global temperature of just 6 degrees Celsius (or 10.8 degrees Fahrenheit), according to scientists’ forecasts. Meanwhile, the scientific community is in general agreement that an increase of 3 degrees Celsius would be a tipping point that could irreversibly change life on Earth – and that it …