Eighteen countries joined the U.S. in signing on to cut greenhouse gas emissions from their national government operations to net zero by 2050 at COP27.

Two Western governors speaking at COP27 said they see states leading the federal government in tackling climate change measures on the ground in the U.S.

With the midterm election outcome at the time still uncertain, Democrats and Republicans attending COP27 offered differing visions for reducing U.S. emissions.

Under new U.S. policies, federal contractors will have to disclose their greenhouse gas emissions and climate risks.

The outcome of Tuesday’s election will have minimal impact on U.S. action on climate change because “the market has made its decision,” said John Kerry.

World leaders at COP27 said fossil fuel companies should be required to put some of their billions in profits into the fight against climate change.

The 27th Conference of the Parties kicked off Sunday in Sharm el-Sheikh, Egypt, with stirring and urgent calls to action.

The 27th U.N. Climate Change Conference of the Parties (COP27) kicks off Sunday in Sharm el-Sheikh, Egypt, with an expected 30,000 attendees.

A series of "fireside chats" at the Global Clean Energy Action Forum focused on what steps the U.S. must take to develop a competitive clean energy sector.

The Sharm El-Sheikh Guidebook for Just Financing will map out the role of different stakeholders in global climate financing.