President Obama, having failed to get a bill to address climate change through Congress when Democrats controlled it, has begun to clamp down on greenhouse gas emissions by using his executive authority under existing law. The biggest component of that is the Clean Power rule that was recently finalized. Another piece fell into place on Tuesday when the Obama administration proposed regulations to limit methane emissions from oil and gas operations. With the administration’s decision (likely a rejection) expected soon on the proposed Keystone XL pipeline, climate activists have a lot to cheer.

But there is a lot more that Obama could do, even without cooperation from Congress. The White House has significant leeway on how to manage natural resource extraction offshore and on federal land. A number of federal policies, from tax law to public lands management, were set up decades ago to encourage fossil fuel development. They haven’t been updated to reflect either the science of climate change or market conditions, but they should be. The administration has made baby steps in this direction: In March, Interior Secretary Sally Jewell said her department will finally begin to consider how to update fossil fuel extraction rules to be consistent with the administration’s climate goals. That’s long overdue, because coal mining on federal land alone is costing taxpayers billions of dollars per year in foregone revenue and costs stemming from climate pollution.

Meanwhile, climate activists are turning up the heat on Democratic presidential frontrunner Hillary Clinton. At an event in New Hampshire last month, college students affiliated with 350 Action demanded to know whether Clinton would ban fossil fuel extraction on federal land. She said no, but — in a nod to shifting sentiment among Democratic voters — Clinton announced Tuesday that she opposes oil drilling in the Arctic Ocean. Clinton also had already called for charging more for fossil fuel extraction on federal land in a campaign speech. But she still has yet to match her challenger Martin O’Malley in calling for more sweeping reform of federal fossil fuel leasing.