Pope Leo spoke at a conference on fighting climate change in Castel Gandolfo, Italy, on Wednesday.

A partially submerged car in Elmsford, N.Y., on Tuesday morning following heavy rains.

Twenty of the 472 stations in New York City’s sprawling subway network had to be temporarily closed on Monday night.

Recent construction work on a sea wall to protect Charleston’s downtown areas.

A section of Hadrian’s Aqueduct in Athens. Its 15-mile network runs beneath the city and is still functional.

In Mountain House, Calif., temperatures yesterday reached 107 degrees, the start of what is expected to be a weeklong heatwave. High temperatures in the region average 95 degrees in a typical July.

A humpback whale in the Santa Barbara Channel, off the coast of California, last year.

Hansa Ahir, left, who salvages recyclable waste for a living in Ahmedabad, India, bought an insurance policy to cover her income on days when heat makes it dangerous to work.

Air travel is responsible for 3 percent of global carbon emissions.

Activists at the COP28 U.N. climate summit in Dubai last December calling for a “Plant Based Treaty,” to call attention to the role played by greenhouse gases that are generated by meat and dairy production.

Harvesting cassava on a farm in Oyo, Nigeria, in May. A new U.S. program is trying to promote a return to traditional crops like cowpeas, cassava and millets.

Kristy Neumeister was among 39 teachers this summer who took part in a four-day training that aimed to expose educators to the basics of climate change.