The 1,200-year-old Major Oak in Sherwood Forest, linked to the legend of Robin Hood, is believed to have died

One of the largest clean energy projects in United States history is now online, delivering electricity from a massive wind farm in New Mexico to Arizona and California.

The Trump administration on Wednesday said it will pay developer Invenergy $765 million to walk away from four U.S. wind leases, including one off the coast of California, and invest instead in geothermal and fossil fuel projects.

Floods that historically had a 1% chance of striking a coastline in a year are now about 12 times more likely, on average.

Lawmakers demand the National Science Foundation stop dismantling the Ocean Observatories Initiative, a $386-million ocean monitoring network being wound down by the Trump administration.

Solar supplied 12.8% of U.S. electricity last month while coal accounted for 12.2%, according to a report from the clean energy think tank Ember.

As supporters honor late Friends of Big Bear Valley leader Sandy Steers, the nonprofit races to raise millions to protect what it says is vital foraging habitat for the famous eagles.

Yohan Hadji, nicknamed ‘Gliderboy,’ has invented a lightweight foam glider that can bring sensors from weather balloons back from the stratosphere.

Rep. Sam Liccardo wants to rebuild the Pacifica pier with help from the federal government. But does investing in this kind of infrastructure make sense?

A freeze in Florida and weather issues in Mexico drove prices higher earlier this year.