Moscow’s exit from the deal generated alarm in a number of populous lower-income countries dependent on Ukrainian grain.

Foreign farmworkers, many of them undocumented, face unique risks due to the coronavirus pandemic. Their struggles reveal vulnerabilities in the U.S. food system.

Political unrest is sweeping Chile, as impatience with inequality grows in what has been one of Latin America’s most prosperous and stable countries.

Anti-government protests could mean humanitarian crisis in Haiti, a country with a long history of instability.

Fires in the Amazon have aroused international concern because of the rain forest’s outsize impact on climate, but political tensions are hampering the response.