Never in Earth’s history, or in ours, have so many fires been ignited in so many places on such a continuous basis. At the most basic level, consider every candle, lantern, and cook fire across the globe: approximately 3 billion people around the world still cook and/or heat their homes with open fires. Then, consider every gas stove, furnace, and water heater; every coal-fired and biomass-burning power station; every generator; every human-caused brush and field and forest fire. Already, we are into many billions of fires per day, worldwide, and that is not even counting matches, lighters, or
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