Climate change is one of the most critical issues facing the United States and the world. President Barack Obama has made it a top priority of his second term and a cornerstone of his legacy. He has passed some of the most sweeping environmental regulations of any president and laid the groundwork for a global climate change agreement in Paris. His decision to reject the Keystone XL pipeline secured his reputation as an environmentalist. Yet it will fall to Obama’s successor to determine whether we continue to move forward with environmentally friendly policies. Here’s where the current presidential candidates stand on climate change.

DEMOCRATS

Hillary Clinton

Clinton hasn’t always been considered green on key issues—while secretary of state, for example, she supported the Trans-Pacific Partnership trade deal. During the campaign, however, she has called climate change an “urgent challenge,” come out against the TPP and arctic drilling, and framed herself as Obama’s natural successor on the environment, vowing to build on his Clean Power Plan.

In July, she unveiled an environmental plan that promises to install more than half a billion solar panels across the country by the end of her first term and boost the amount of energy that comes from renewables from 13 percent to 33 percent by 2027. In November, she released a $30 billion plan to help revitalize communities in coal country as the economy transitions away from fossil fuels. And her campaign has signalled that the public should expect additional environmental announcements in the coming months.