Every silver lining has a cloud. The technologies that offer human beings comforts and opportunities that would have been unimaginable two centuries ago ultimately depend on an abundance of energy. Fire is the source of that energy. But the burning of fossil fuels, from which we gain so much, also releases the carbon dioxide that threatens to destabilise the climate.
每一線光明都伴隨一片烏云。技術給人類帶來的舒適生活和機遇，是兩百年前無法想象的，這些技術從根本上來說都要依賴大量的能量。而火是能量的來源。但化石燃料的燃燒雖然給我們帶來許多好處，其釋放的二氧化碳卻會威脅氣候穩定。
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