Do I Really Need an Air Purifier?

We asked the experts how to decide.

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Do You Need to Be Worried About Mold in Your Air-Conditioner?

They all have the potential for moldiness. Here’s how to protect yourself.

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Republican Lawmakers and Agriculture Groups Question MAHA Report

The G.O.P. chairmen of the House and Senate agriculture committees said they were “troubled” by the Make America Healthy Again Commission’s findings and urged it to use sounder science.

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In ‘Cancer Alley,’ a Battle Over Who Gets to Measure Air Pollution

Community groups are fighting an unusual Louisiana law that restricts how they use data from air-quality monitors, saying it violates free speech.

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The South Bronx Has a Pollution Issue. Congestion Pricing May Worsen It.

Preliminary data from the first few weeks of New York City’s tolling plan show a possible uptick in traffic in the neighborhood.

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Yes, Some Vaccines Contain Aluminum. That’s a Good Thing.

R.F.K. Jr. and others have blamed the ingredient for allergies and other illnesses. Scientists say it actually bolsters the immune response.

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Even Homes That Evade the Fire Face Toxic Ash Risk, Studies Show

Health hazards from soot and smoke blown indoors onto furniture and walls can linger for months: “Wind will get through every crack.”

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Wildfires Can Harm Your Health, Even if You’re Far Away, Experts Say

Some studies have indicated that young children, especially those under the age of 4, are at particular risk because their lungs are still developing.

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