Creation of digital bitcoins by computer networks has real-world consequences in form of massive energy use, including fuels that cause most pollution.
The Indian Captive Power Producers Association denounced that most of its member companies are getting half of the coal they need from state-owned Coal India.
A U.S. federal appeals court on Tuesday upheld a lower-court ruling keeping a ban on uranium mining around the Grand Canyon, but also upheld a separate decision allowing a uranium mine nearby to open.
A sit-in by miners of ArcelorMittal's Kazakh unit widened to all of the firm's coal mines on Tuesday as hundreds of workers demanded a 100 percent wage rise.
China Three Gorges says this would be not only the largest but also the "most intelligent solar power project with the most advanced technology in the world."