If pollution is your focus but not global warming, then you&#x27;ll focus more on scrubbing technologies and better combustion and the like. A lot of stuff can burn extremely cleanly now if you ignore CO2, and the only reading to look at CO2 is climate change. It&#x27;s not important at all as a pollutant otherwise.<p>I also doubt that people would be unified on pollution if not for global warming. In my experience, the people who doubt climate change also downplay pollution in general. It&#x27;s largely the same people saying global warming is a liberal hoax, and complaining about how the government says they can&#x27;t dump used motor oil down the storm drains, can&#x27;t buy freon anymore, cars have to come with catalytic converters, and such.