In what would the most ambitious U.S. effort ever to stave off the worst effects of climate change, President Joe Biden is aiming to cut oil, gas and coal emissions and double energy production from offshore turbines through executive orders. The orders awaiting his signature target federal subsidies for oil and other fossil fuels and halt new oil and gas leases on federal lands and waters. They also intend to conserve 30 percent of the country’s lands and ocean waters in the next 10 years, move to an all-electric federal vehicle fleet and elevate climate change to a national security...