The Iran war is pushing countries to prioritize domestic energy in order to protect themselves from volatile oil and natural gas markets.

The Iran war is pushing countries to prioritize domestic energy in order to protect themselves from volatile oil and natural gas markets.

© Jes Aznar for The New York Times

The pilot turns unused railway space into a small but closely watched solar test.

A PAC representing wind and solar energy interests spent $1.1 million to boost the Republican primary opponent of Chip Roy, an opponent of renewables. Now they are trying to save a Republican ally in Iowa.

A PAC representing wind and solar energy interests spent $1.1 million to boost the Republican primary opponent of Chip Roy, an opponent of renewables. Now they are trying to save a Republican ally in Iowa.

© Michael A. McCoy for The New York Times

A new wave of start-ups are trying to harvest emissions-free energy from inside the Earth, but the industry still faces significant challenges.

© Eduardo Munoz/Reuters