President Joe Biden took a highly anticipated step on Wednesday toward fulfilling a bold but controversial campaign promise: ending oil and gas leasing on federal lands and waters. The halt on leasing is among the most attention-grabbing measures, but it’s not likely to be the most consequential item in a suite of executive actions announced by the White House as part of the new administration’s efforts to rein in climate change. Included in them is another campaign pledge to conserving at least 30 percent of the nation’s land and seas by 2030—supporters call the idea 30 by 30. Biden’s orders also establish a White House Office of Domestic Climate Policy; firmly plant climate considerations in national security and foreign policy; and create a government-wide initiative to promote environmental justice, among other steps. “In my view, we’ve already waited too long to deal with this climate crisis and we can’t wait any longer,” Biden said before signing...