They’ve fallen 87% since 2010. That means cheaper electric vehicles.

Some see a conflict of interest in how PACE loans are made.

Brunswick, Georgia is trying to install solar panels in a field, so it can sell the power to the local utility for a rebate that can be given to low-income residents.

Here's what you need to do next.

Do you have solar panels at home? Do your neighbors?

The five turbines of the Deepwater Wind project in Rhode Island are now complete.

The tech giant says "ruthless" private business thinking is necessary for energy innovation.