The efforts, which span at least seven federal agencies, could help fulfill President Joe Biden’s climate ambitions to decarbonize the power grid by 2035 and at least halve U.S. greenhouse gas emissions by the end of the decade. The initiatives are being unveiled as key elements of Biden’s climate agenda are stalled in the Senate. The planned offshore wind lease sale next month would give renewable developers a shot at buying leases to install turbines in shallow Atlantic waters between New Jersey and New York’s Long Island. The six tracts that will be auctioned off in the so-called New York Bight have the potential to generate as much as seven gigawatts of electricity — enough to power 2 million homes — according to the Interior Department. Other new lease terms will encourage winning bidders to enter into agreements with labor unions and use U.S.-built turbine blades, towers and other equipment.