Four key trends could speed the transition to renewables: the world’s growing determination to put a brake on climate change; a sea change in China’s stance on growth and the environment; the increasing embrace of green energy in the developing world; and the growing affordability of renewable energy.

The biggest extinction ever known on Earth resulted from the oceans turning acidic because of an increase in CO₂, the main gas driving human-caused climate change today.

The current transatlantic view of Europe is one of continental political decline, elegant at best but ominous at worst.

In his Sunday sermon, the Patriarch Philaret of the Ukrainian Orthodox Church of Kyiv explained to his parishioners that Ukrainian soldiers who kill civilians and rebels in Donbas do not transgress God’s commandment “thou shalt not kill”.

Despite grim outcomes since the American military began “pivoting” to Africa after 9/11, the U.S. recently signed an agreement designed to keep its troops on the continent until almost midcentury.

The frozen soil of the northern polar regions holds billions of tonnes of organic carbon—and global warming could speed its escape into the atmosphere.

Russian President Vladimir Putin spoke by phone with Israeli Prime Minister Benjamin Netanyahu on Tuesday with regard to the Russian Federation’s decision to go ahead with the sale to Iran of S-300 anti-aircraft batteries.

Barring the political equivalent of an asteroid strike, it’s over. The slick video Hillary Clinton released Sunday was both campaign announcement and acceptance speech.

CleanTechnica reports that Spain got nearly 70 percent of its electricity from plants that did not generate carbon dioxide in March. The two biggest non-carbon energy sources were nuclear and wind.