STOCKHOLM, Sweden - Bert Bolin, a pioneering Swedish climate scientist and co-founder of the U.N.'s Nobel award-winning Intergovernmental Panel on Climate Change, has died, his colleague Henning Rodhe said Wednesday. He was 82. As early as the 1950s, Bolin produced research about the circulation of carbon in nature that remains relevant to the continuing debate on climate change. Most importantly, he played a key role in communicating the dangers of climate change to decision-makers and served as the first chairman of the IPCC from 1988 to 1998. He died in a Stockholm hospital from stomach cancer, but was active until...