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

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

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.

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.

Amir Alavi, center, an engineering professor at the University of Pittsburgh, is one of the leaders of a project using artificial intelligence in transportation projects in Pennsylvania.

ConocoPhillips pipelines on the North Slope of Alaska, near the planned site of the Willow Project.