符咒|泰国佛牌|风水物品
中文回答：
煤主要由古代植物在缺氧或微氧环境中，经过长期的地质作用转化而成。这一过程发生在数百万至数亿年前的地质时期，当时的植物（主要是陆生植物，如蕨类、裸子植物等）在生长过程中吸收了太阳能，并通过光合作用将大气中的二氧化碳转化为有机物储存在体内。当这些植物死后，它们的遗体在沼泽、湖泊或河流等沉积环境中堆积，与空气隔绝或处于微氧状态，从而避免了被完全氧化分解。随着时间的推移，这些植物遗体在地下经历了复杂的生物化学作用和物理化学作用，包括微生物的分解、压实作用、脱水作用以及高温高压下的煤化作用，最终转化为了煤。
English Answer：
Coal is primarily formed through the long-term geological transformation of ancient plants in oxygen-deficient or micro-oxygen environments. This process occurred during geological periods millions to billions of years ago, when plants (mainly terrestrial plants such as ferns, gymnosperms, etc.) absorbed solar energy during their growth and converted atmospheric carbon dioxide into organic matter stored in their bodies through photosynthesis. After these plants died, their remains accumulated in depositional environments such as swamps, lakes, or rivers, where they were isolated from air or existed in a micro-oxygen state, thus avoiding complete oxidative decomposition. Over time, these plant remains underwent complex biochemical and physicochemical processes underground, including microbial decomposition, compaction, dehydration, and coalification under high temperature and pressure, ultimately transforming into coal.
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