The war in Ukraine is forcing the U.S. to reconsider its dependence on oil.

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

“On the supply side, it’s very clear that they were not planning for such a high demand,” one expert told us.

The number of proposed solar projects has spiked as costs have declined, but the transmission system can’t accommodate them.

A small British company says it is on track to decarbonize the economy with an abundant, safe and cheap source of energy — eventually.

We won’t stop using fossil fuels right away, but the transition to renewable energy could be tricky.

Because no form of electrical generation operates at full capacity all the time.

British prime minister Boris Johnson pledges to turn the U.K. into a leading producer of carbon-free hydrogen to cash in on a global boom.

Instead, they’ll put about $18 billion a year into renewable energy projects.

The country is criticized for doing too little, too slowly, but efforts are already having an impact.