A recent study by noted climate scientists is particularly bad news for the planet’s most vulnerable regions, including the Arctic and small Pacific islands. 

The United States and Russia are at odds on so many issues that the upcoming summit could convince their two presidents to give up on better relations and accept estrangement.

The conference in Poland will be a major test of the world’s collective political will to fight global warming. Following through on promises made in Paris will not be easy.

February’s presidential election does not inspire confidence in the democratic trajectory of Africa’s most populous country.

Donald J. Trump and Xi Jinping plan to hold a bilateral meeting on the sidelines of the G20 summit in Japan, but it’s not clear that an end to tariffs is in sight.