Better yet, the carbon dioxide in the exhaust gases could potentially be captured and buried underground.

FORBES: Magazine Article

These include the exhaust gases such as nitrogen oxides (NOx), non-methane volatile organic compounds (NMVOCs), and carbon monoxide (CO).

BBC: London's clue to stubborn ozone levels

The exhaust gases are at several hundred degrees, and so the water is instantly vaporised, producing huge clouds of steam.

BBC: Key tests for Skylon spaceplane project

The new development uses exhaust gases to move the airflow around the diffuser and rear beam wing more effectively.

BBC: Fernando Alonso backs Ferrari to battle for F1 title

Still, his team has led the complaints to Pirelli because Red Bull uses exhaust gases to improve its cars' rear downforce, which exposes the tires to more heat.

WSJ: Tire Trauma as Formula One Stars Feel Heat

The carbon capture and storage technology can strip carbon from fossil fuel exhaust gases and store it in rocks, but it is unproven at scale, trials are years behind schedule and it may not work in some areas of the world.

BBC: Firms 'own unburnable fossil fuels'

Exhaust gases from shipping already brighten clouds over various bits of the ocean, and in so doing are thought to cool the Earth appreciably.

ECONOMIST: Geoengineering