The Bulletin of the Atomic Scientists hosted a mini-forum on what President Trump's new executive order on climate means for the Paris Agreement. My take is that this is a de facto withdrawal of the Paris pledge, but that the United States was never on track to meet those commitments—absent the level of policy action we are now seeing from President Trump, albeit in the opposite direction.
Thanks to Bulletin editor Dawn Stover and Ken Caldeira for the chance to share my views.