Newly uncovered documents reveal that the gas industry understood that its stoves were polluting the air inside homes 50 years ago — and then moved to conceal that information. It stands in stark contrast to the industry’s denial of the health dangers posed by gas stoves today.

In a draft report on natural gas and the environment in January 1972, the American Gas Association included a section on “Indoor Air Quality Control” that detailed its concerns with pollution from gas appliances like carbon monoxide and nitrogen oxides. The document showed that the trade group was in the process of researching solutions “for the purposes of limiting the levels of carbon monoxide and nitrogen oxides in household air.” But all that information disappeared from the final text, according to reporting by the climate accountability site DeSmog on Thursday.

That draft report…

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