Tearing up the Paris Agreement does not constitute a policy.

After I've had an opportunity to reflect more calmly and carefully on the implications of the forthcoming Trump presidency for environmental, natural resource, and energy policy, I will return to this topic.

California can play a very important role by showing leadership -- in two key ways. One is to demonstrate a commitment to meaningful reductions in GHG emissions. In this regard, California has more than met the bar, with policies that are as aggressive as -- if not more aggressive than -- those of most countries.

There are a substantial number of issues that negotiators will eventually need to address, and likewise, there are a set of questions that researchers (including within the Harvard Project on Climate Agreements) can begin to address now.