A decade ago, climate policy was largely driven by states and localities, in some cases working collaboratively on a regional basis. That began to shift between 2009 and 2016. During this time, federal engagement in attempting to reduce greenhouse gas emissions expanded, addressing the electricity, transportation, and energy production sectors, while at the very same time a number of states and localities backtracked on earlier commitments.

Source: Survey: Majority of Americans want government to step up action on climate change