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New research shows 21 harmful chemicals present in gas used in homes.



The Center for Climate, Health and the Global Environment at Harvard T.H. Chan School of Public Health, PSE Healthy Energy, Boston University, and HEET published a study showing gas stoves release at least 21 other harmful pollutants - besides methane - that put families’ health at risk.

  • Study conducted between December 2019 and May 2021.
  • Research included the Greater Boston area.


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The gas we use at home contains at least 21 different hazardous air pollutants, a much bigger and more dangerous quantity than previously thought.

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To reduce their effects, get a gas leak detection survey, increase kitchen ventilation and be wary of gas leaks. Government rebates could also help ease the transition to electric stoves.

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These pollutants impact indoor air quality and are linked to short and long-term health problems, including cancer and early asthma development in children.

200 +
Gas Samples Collected
Hazardous Air Pollutants
Unique Chemical Compounds Identified
States Including These Toxins in Emissions Inventory
A healthy home is an all-electric home
Healthy Home
A healthy home is an all-electric home.

Gas stoves are poisoning your home with toxic pollutants. Ditching gas is the path to a cleaner home.

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Family First
Put your family first. Protect your kids from gas stoves.

Gas stove use has been linked to early asthma development in children. Don’t put your family in harm’s way.

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Bad Bargain
Gas stoves don't just release methane.

They release 21 other toxic pollutants—a bigger health hazard than you bargained for and not worth the price.

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The Gas Industry Lied To You
Gas companies told you their product was safe.
Gas companies lied to you. They claimed their product was safe, but Harvard's recent study exposes the truth: 21 harmful chemicals come from gas stoves every time you use them.
A black and white photo of a women wearing a gas mask and cooking over a gas stove.

Want Gas Gone?

Ready to get gas out of your kitchen? You can make the switch right away, or wait until the end of your gas stove’s life and then replace it with an electric stove. However you decide to electrify, here’s a guide to help you make the switch to a safe, clean, efficient electric stovetop. 


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Harvard Harvard Peer Reviewed Study
Home is where the pipeline ends.

Researchers conducted a hazard identification study, which evaluated whether air pollutants are present in natural gas, but did not evaluate human exposure to those pollutants. Between December 2019 and May 2021, researchers collected over 200 unburned natural gas samples from 69 unique kitchen stoves and building pipelines across Greater Boston. From these samples, researchers identified 296 unique chemical compounds, 21 of which are federally designated as hazardous air pollutants. They also measured the concentration of odorants in consumer-grade natural gas – the chemicals that give gas its characteristic smell – and found that leaks containing about 20 parts per million methane may not have enough odorant for people to detect them. The samples were taken from the territories of Eversource Gas, National Grid, and the former Columbia Gas, who together provide service to 93% of Massachusetts gas customers.

In the not-too-distant future, America will look back at gas stoves the same way we look back at smoking indoors. Gas stoves are already linked to asthma and are especially harmful to young kids who are 42% more likely to have asthma if they live in a home with a gas stove. Now we discover they are linked to cancer-causing chemicals, too.

Liliana Arteaga, East Boston
Mothers Out Front


Tell Congress

It's time to protect families from gas pollution.

While individuals can take steps to reduce the effects of exposure to chemicals from gas stoves, solutions at the individual level are costly and not always accessible. That's why we must pressure our elected officials and the U.S. Consumer Product Safety Commission to act in support of policy that mitigates potential health risks posed by gas stoves.