The 1940s Spike

Popular Science - - CHARTED -

Boom­ing in­dus­try and wide­spread car own­er­ship likely spurred this jump above av­er­age. It was cut short, iron­i­cally, by a burst of aerosol pol­lu­tion from coal and oil, which ac­tu­ally cools the planet by seed­ing clouds that scat­ter sun­light. But by the 1970s, emis­sions of com­pounds like CO2 out­paced any pol­lu­tant-re­lated cool­ing effects.

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