InsideClimate: In 1980, as Exxon Corp. set out to develop one of the world's largest deposits of natural gas, it found itself facing an unfamiliar risk: the project would emit immense amounts of carbon dioxide, adding to the looming threat of climate change. The problem cropped up shortly after Exxon signed a contract with the Indonesian state oil company to exploit the Natuna gas field in the South China Seabig enough to supply the blossoming markets of Japan, Taiwan and Korea with liquefied natural gas into...