More than 400 wildfires burning across Canada have triggered air quality alerts across a large portion of the U.S. In New York City, record-setting air pollution bathed the city in an ominous orange haze.

In downtown San Francisco, in a cavernous garage that was once a Honda dealership, a gleaming white-and-blue appliance about the size of a commercial refrigerator is being prepared for transport to a hotel in Los Angeles.

One of the challenges in treating burn victims is the frequency of dressing changes, which can be extremely painful.

An unusually intense start to Canada’s wildfire season filled skies with smoke in May 2023.

In the United States, low-income immigrant and minority children often live in environments that have highly polluted air.

The world is getting hotter, causing shifts in seasonal patterns and increasing the amount of extreme weather such as severe droughts and heat waves, which can affect crop yields and food supplies.

Bob Powell had spent more than a decade in the energy industry when he turned his attention to the problem of plastic waste.

Plastic made from cane sugar also threatens the environment.

Researchers have identified soil bacteria able to break down some PFAS chemicals, known as “forever chemicals” because they take decades to degrade naturally.

Scientists have been worried about the potential harms of microplastics for years.