An uncomfortable truth …

A lot of industries — and businesses not pejoratively called industries like farmer’s and rancher’s cooperatives — have used the techniques of “big tobacco” to sell their products, and overcome regulation. When businesses of all sorts band together, they produce their own science and research, and use those claims to back up their marketing. Often government and academia is deeply involved in supporting these industries, and you have be very skeptical of claims put out and weight the pros and cons of any scientific study. Skepticism matters!

NPR

How gas utilities used tobacco tactics to sell more gas stoves : NPR

In the late 1960s, natural gas utilities launched "Operation Attack," a bold marketing campaign to bring lots more gas stoves into people's kitchens.

The gas utilities called Operation Attack their "most ambitious advertising and merchandising program ever." But as it got underway, concerns were becoming public about indoor pollution from gas stoves, including household levels of nitrogen dioxide.

Around the same time, Dr. Carl Shy, a federal public health researcher, was looking into the health effects of nitrogen dioxide. In 1970, Shy published a study showing that families exposed to greater levels of the air pollutant nitrogen dioxide outdoors had higher rates of respiratory illness than families in less-polluted areas. The research caught the attention of the gas utility industry, and they asked Shy for a meeting.