ExxonMobil, the largest American oil group, has written to the Trump administration urging it to keep the US in the Paris climate accord...arguing that the Paris accord is “an effective framework for addressing the risks of climate change”...[The letter cites] several reasons for the US to stay in the Paris accord, including the opportunity to support greater use of natural gas, which creates lower carbon dioxide emissions than coal when burnt for power generation. Several other large international oil companies, particularly in Europe, have also backed action to address climate change that could benefit them by boosting demand for gas.