These scientists think your old AC unit is part of the solution to combating climate change.

CO2 Suckers

A team of researchers from Germany and Canada have proposed a radical environmental concept: retrofitting old air conditioning units so that they suck in excess carbon dioxide and turn it into renewable fuel — a concept they term "crowd oil."

In the journal Nature Communications, they argued that the tech would allow "people to take control and collectively manage global warming and climate change, rather than depending on the fossil power industrial behemoths."

Renewing the Renewable

Carbon scrubbing, which means sucking up carbon dioxide from exhaust gases, has been around for a while. In fact, Iceland even opened a "negative emissions" power plant in 2017 that turns carbon dioxide into carbonate minerals.

But turning the gas into useful "high-energy-density chemical fuel," as the paper describes it, is a much bigger challenge. Besides, the consumer-grade tech that could turn your old AC unit into a environment-saving miracle device has yet to be invented.

There's also the pesky reality that air conditioning units require a lot of electricity to run — though the authors of the letter suggest it could come from solar panels.

READ MORE: Scientists lay out plan to use air conditioners to save the world [CNET]

More on CO2 and fuel: New Artificial Leaf Design Could Absorb Far More CO2

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