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.
每一线光明都伴随一片乌云。技术给人类带来的舒适生活和机遇，是两百年前无法想象的，这些技术从根本上来说都要依赖大量的能量。而火是能量的来源。但化石燃料的燃烧虽然给我们带来许多好处，其释放的二氧化碳却会威胁气候稳定。
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