For years now, people have argued over both the reality and nature of climate change on our Earth. Scientists, mostly, have increasingly argued the preponderance of evidence points strongly towards a significant change in global climate in the offing. Meanwhile, politicians, mostly, have argued it isn’t happening, and, anyway, if even it is, it is not from the hand of mankind. Now a high-level American scientific body, the National Research Council, has thrown its full public weight behind the fact of climate change. In the process, it has urged carrying out the right kinds of research – and some key actions – to come to grips with this looming reality. By J. BROOKS SPECTOR.