Mission Innovation will help deliver affordable clean energy and new jobs and opportunities to people around the world for decades to come.

My Administration is committed to ending the spread of HIV and improving the lives of all who live with it.

We will reduce our carbon emissions in the range of 17 percent below 2005 levels by 2020.

Thanks in part to these investments, America now generates 20 times as much solar power as we did in 2008.

The Paris agreement must drive serious and ambitious action by all nations to curb carbon pollution.

Helping developing nations skip the dirty phase of development is vital to meeting this challenge.

We cannot forge a climate agreement that says they are permanently resigned to not having electricity.

Because we don't yet know exactly what's going to work best.

I urge the Governors of the States and the Commonwealth of Puerto Rico, officials of the other territories subject to the jurisdiction of the United States, and the American people to join me in appropriate activities to remember those who…

H.R. 8 would undermine the current hydropower licensing regulatory process in place under the Federal Power Act that works to minimize negative impacts associated with the siting of hydropower projects.

One of the enemies that we'll be fighting at this conference is cynicism, the notion we can't do anything about climate change.

Civilian Federal employees have already made significant sacrifices as a result of 3-year pay freeze that ended in January 2014.