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A destructive fire-generated vortex – a massive stream of rising, spinning, smoke, ash and fire – that topped out at 17,000 feet above the earth, accelerated the Carr Fire that killed eight people and devastated a widespread area in the Redding, California region in July 2018. 

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The air in Beijing is often very bad. The city sinks under a brown cover made of exhaust gases from industry, cars and coal fires, which blow a lot of harmful particulate matter, soot, sulfur dioxide and nitrogen oxides into the air.

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