Russia’s moves to mobilize thousands more troops and to annex more of Ukraine’s territory signal a new, potentially more dangerous phase of the war.

A devastating power crisis is plaguing South Africa, battering its economy and threatening to sink its climate goals amid the global race to renewables.

Russia’s aggression against Ukraine has brought European dependence on Russian energy into sharp relief and set off a scramble for alternatives.

The Biden administration is imposing a diplomatic boycott of the 2022 Olympics in Beijing. What could a boycott accomplish, and how might China respond?