President Obama, in his speech at Georgetown University yesterday, finally made clear that he was done waiting for Congress to act on the mounting evidence that climate change is already well underway. He announced a series of executive actions, none of them needing the approval of Congress, to crack down on carbon pollution from power plants, accelerate the growth of renewable energy, increase energy efficiency for commercial, industrial, and federal buildings, and prepare the nation for the impacts of climate change.

As many have already pointed out, these actions do not go far enough and may very well be too little, too late. Obama still hasn’t acknowledged the serious risks posed by fracking and he clearly left himself an out on the Keystone XL pipeline. His decision will depend, to paraphrase one of his White House predecessors, on what the meaning of the word “significantly” is, as in “approval to build the pipeline will only be granted if it does not significantly exacerbate the climate problem.”

Still, although long overdue, the president’s speech was a bracing call for action and has the potential to shift the dynamics of what has been a very frustrating stalemate. Perhaps the most important point made in his remarks came near the end, when he stressed that the climate challenge “is not just a job for politicians”:

Convince those in power to reduce our carbon pollution. Push your own communities to adopt smarter practices. Invest. Divest. Remind folks there’s no contradiction between a sound environment and strong economic growth. And remind everyone who represents you at every level of government that sheltering future generations against the ravages of climate change is a prerequisite for your vote. Make yourself heard on this issue.

“Make yourself heard”: this is the essence of democracy. With so much at stake, this is no time to sit on the sidelines.