Cooking with gas hobs or ovens releases benzene — a chemical that has been related to the next threat of leukaemia and different blood cell cancers.

This is the warning of a examine by researchers from the US, who discovered that combustion from a single gasoline ring on excessive or a gasoline oven set to 350F (176C) can elevate indoor ranges of the carcinogen above these present in second-hand tobacco smoke.

The workforce additionally warned that benzene can drift all through a house, lingering for hours.

It is estimated that just about 54 p.c of households within the UK nonetheless cook dinner with gasoline — or greater than 14 million households.

READ MORE: ‘World’s healthiest crisps’ created - and it's all about the potato's maturity

The examine was undertaken by earth system scientist Professor Rob Jackson of the University of Stanford and his colleagues.

Prof. Jackson mentioned: “Benzene forms in flames and other high-temperature environments, such as the flares found in oil fields and refineries.

“We now know that benzene also forms in the flames of gas stoves in our homes.

“Good ventilation helps reduce pollutant concentrations, but we found that exhaust fans were often ineffective at eliminating benzene exposure.”

Previous research into the well being and environmental implications of gas-burning stoves, the workforce mentioned, have focussed on leaks when hobs are turned off.

One such investigation from Stanford, for instance, discovered that gasoline stoves in US properties leak a lot methane when not in use that they've a local weather impression akin to the carbon footprint of 500,000 fossil fuel-powered automobiles.

That examine additionally discovered that they expose customers to pollution equivalent to nitrogen dioxide which might be identified to set off respiratory illnesses.

And a meta-analysis conducted back in 2013 discovered that kids who dwell in properties fitted with gasoline stoves had a 42 p.c larger threat of creating bronchial asthma than these in properties with out.

A more recent study from 2022 added to that discovering, estimating that greater than 10 p.c of all instances of bronchial asthma in kids within the US may be attributed to gasoline stoves.

In the brand new examine, Prof. Jackson and their colleagues measured benzene ranges after cooking in 87 properties throughout California and Colorado.

Not solely does benzene drift in regards to the dwelling having been produced throughout cooking, however the workforce discovered that concentrations measured in bedrooms can exceed each nationwide and worldwide well being benchmarks.

The researchers famous that each pure gasoline and propane burners and over emit between 10–50 occasions extra benzene than electrical hobs — and at a price tons of of occasions larger than detected in research of leaks from stoves that aren't in use and turned off.

In distinction, the workforce famous that induction cooktops emit no detectable ranges of benzene.

Furthermore, they detected no emission of benzene from both pan-fried salmon or bacon, with all of the emissions they did report having come from the gas used.

Paper co-author and fellow Stanford earth system scientist Yannai Kashtan mentioned: “I’m renting an apartment that happens to have an electric stove. Before starting this research, I never thought about it twice.”

He concluded: “But the more we learn about pollution from gas stoves, the more relieved I am to be living without a gas stove.”

The analysis was funded by the High Tide Foundation, a New York-based environmental organisation.

The full findings of the examine have been revealed within the journal Environmental Science & Technology.