According to author and environmentalist Bill McKibben, the explosion of solar is “the first hint that we've actually had of something that's scaling fast enough to make even a small difference in how hot this planet gets.”

Meanwhile, China is outpacing everyone when it comes to building new solar and wind energy projects.

An energy emergency declaration might be unprecedented, but the end goals are not.

It isn’t easy to upgrade a 20th-century system of transmission lines, generating stations and home outlets for 21st-century needs.

In April, General Electric split itself up to focus on wind power, aerospace and health care. Its finance and media divisions are long gone.

Giant batteries can extend the reach of wind and solar power — which accounted for 22% of electricity generated last year, the EIA says.

More offshore wind projects are being approved, but many are also running into economic and logistical challenges.

A new power line project will transfer Wyoming wind to supply parts of the Southwest with electricity. Wyoming’s focus on renewable energy is a shift from its history with fossil fuels.

How to staff up the slew of renewable energy projects ushered in under the legislation is a pressing question within the industry.

Solar, wind and nuclear energy confront old and new obstacles to competing with fossil fuels.