Beijing is selling clean energy to the world, Washington is pushing oil and gas. Both are driven by national security.

Google has agreed to purchase electricity from a forthcoming nuclear fusion power plant, the so-called holy grail of clean energy that scientists have been chasing for more than half a century. While ...

Shares of most solar-power companies and those in the nuclear-power business were headed in opposite directions on Monday, as the Senate’s final version of its tax and spending bill was worse than the ...