"The U.N. itself must better prepare to help tens of millions of "environmental refugees," the group said, and authorities everywhere should discourage new building on land less than one meter — 39 inches — above sea level." "Temperatures rose an average 1.3 degrees over the past 100 years. The scientists who produced Tuesday's report said further rises this century should be limited to about 3.6 degrees, or the world risks crossing a climate "tipping point" that could produce "intolerable impacts on human well-being." "The challenge of halting climate change is one to which civilization must rise," said the panel of 18 scientists from 11 nations, whose work was conducted at U.N. request.." http://news.yahoo.com/s/ap/20070227/ap_on_...limate_change_1