Times of India: After more than 20 years of concerted international effort, our understanding of the impact of human activity on the climate has improved dramatically. The results are sobering: unchecked, greenhouse gas emissions are leading to higher temperatures and sea levels, greater stresses on water supplies, and changes in ecosystems. They are also a leading factor in the retreat of most of the world’s glaciers. But to judge from the hue and cry emanating from the IPCC’s recent withdrawal of …