🛢️ 化石燃料：几亿年的阳光存款🛢️ Fossil Fuels: Sunshine Saved for Millions of Years
上一片的太阳风很好，可今天还靠“老存款”。蓝色星球向导挖开了账本。煤、石油、天然气，全是远古生物的遗体。Last leaf's sun and wind are lovely — yet today's power and cars still run mostly on “old savings”. Our blue-planet guide digs open the ledger: coal, oil and gas are all remains of ancient life.
第 1 步：远古森林变成了煤Step 1: Ancient forests turned into coal
先看煤：它是几亿年前的森林，被土埋出来的。Start with coal: forests from hundreds of millions of years ago, buried by soil.
几亿年前的高大蕨类倒下，被泥沙一层层盖住。压久了、热久了，就变成了黑亮的煤。煤是阳光的老存款：植物先存下太阳，煤再存下植物。Hundreds of millions of years ago, giant ferns fell and were buried layer by layer under mud and sand. Pressed long and heated long, they became glossy black coal. Coal is sunshine's old savings: plants saved the sun, coal saved the plants.
煤躺在浅层好挖，石油藏在深处，怎么取出来？Coal lies shallow and digs easy — but oil hides deep. How do we get it out?
第 2 步：打洞去取深处的油Step 2: Drill deep to fetch the oil
石油多是远古小生物的遗体，变成油滴挤在石头缝里。钻井架打下几千米的洞，像吸管一样把油吸上来。天然气常和油住在一起，点火就着。Oil is mostly remains of tiny ancient creatures, squeezed as droplets into rock cracks. A drilling rig bores a hole thousands of meters deep and sips the oil up like a straw. Natural gas often lives with oil — one spark and it burns.
取出来烧掉很爽，可烟里有东西在悄悄加热地球。Burning it feels great — but something in the smoke is quietly heating Earth.
第 3 步：燃烧放 CO2，存款越用越少Step 3: Burning releases CO2, savings run down
一烧就放二氧化碳（CO2），它像被子一样捂住地球。攒了几亿年的存款，两百年就烧掉大半。出路叫能源转型：让用不完的太阳风来接班。Every burn releases carbon dioxide (CO2), which blankets Earth like a quilt. Savings built over hundreds of millions of years are mostly burned in two centuries. The way out is the energy transition: let the endless sun and wind take over.
🎮 你来当账房先生（30 秒）🎮 Your turn: bookkeeper (30 seconds)
道理讲完了。先拨燃料、拖用量，看年限和 CO2 怎么变。再算对 4 笔账，看存款能撑几年。Theory done. First switch fuels and drag usage to watch the remaining years and CO2 move; then get 4 accounts right and see how long the savings last.
一句话记住它：化石燃料 = 远古生物遗体攒的阳光存款（煤/油/气）；几亿年才攒下，两百年就烧空，还放 CO2 变暖气候。Remember it in one line: fossil fuels = sunshine savings from ancient remains (coal / oil / gas); hundreds of millions of years to save, two centuries to burn — plus CO2 that warms the climate.
三存款：煤是远古森林，油气是远古小生物，钻井是吸管Three savings: coal from ancient forests, oil + gas from tiny ancient life, rigs are straws两后果：烧完就没了；燃烧放 CO2，捂热地球Two costs: burned means gone; burning releases CO2 that blankets Earth一条出路：能源转型，用可再生＋储能来接班One way out: the energy transition — renewables plus storage take over
内容参考 OpenStax 等公开教材，多来源核对 · AI 生成、人工审核 · 发现错误欢迎指正，帮这片叶子长得更好。Based on OpenStax and other open textbooks, cross-checked across sources · AI-generated, human-reviewed · Spotted a mistake? Tell us — help this leaf grow.
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