英语导读1000句（二十八）
<p> <span word="Section">Section</span>28 <span word="Acid">Acid</span> <span word="Rain">Rain</span></p><p> 50 <span word="years">years</span> <span word="ago">ago</span>, <span word="no">no</span> <span word="one">one</span> <span word="talked">talked</span> <span word="about">about</span> <span word="acid">acid</span> <span word="rain">rain</span>.50年前，没人谈论酸雨。</p><p> <span word="Then">Then</span> <span word="we">we</span> <span word="didn">didn</span>#39;<span word="t">t</span> <span word="really">really</span> <span word="know">know</span> <span word="the">the</span> <span word="harm">harm</span> <span word="it">it</span> <span word="was">was</span> <span word="causing">causing</span> <span word="to">to</span> <span word="the">the</span> <span word="world">world</span>.那时，我们没有真正了解它对世界的危害。</p><p> <span word="Today">Today</span> <span word="almost">almost</span> <span word="every">every</span> <span word="adult">adult</span> <span word="and">and</span> <span word="school">school</span> <span word="child">child</span> <span word="is">is</span> <span word="aware">aware</span> <span word="of">of</span> <span word="acid">acid</span> <span word="rain">rain</span> <span word="and">and</span> <span word="its">its</span> <span word="effects">effects</span>.现在，几乎所有成年人和学生都认识到酸雨及其危害性。</p><p> <span word="It">It</span> <span word="affects">affects</span> <span word="people">people</span> <span word="all">all</span> <span word="around">around</span> <span word="the">the</span> <span word="world">world</span>.它对全世界的人都有影响。</p><p> <span word="Even">Even</span> <span word="those">those</span> <span word="who">who</span> <span word="are">are</span> <span word="not">not</span> <span word="responsible">responsible</span> <span word="for">for</span> <span word="its">its</span> <span word="creation">creation</span> <span word="suffer">suffer</span> <span word="from">from</span> <span word="it">it</span>.即使那些与其产生无关的人，也被其所累。</p><p> <span word="It">It</span> <span word="is">is</span> <span word="caused">caused</span> <span word="mostly">mostly</span> <span word="by">by</span> <span word="the">the</span> <span word="burning">burning</span> <span word="of">of</span> <span word="fossil">fossil</span> <span word="fuels">fuels</span>.它大都是由于燃烧化石燃料而致的。</p><p> <span word="Fossil">Fossil</span> <span word="fuels">fuels</span> <span word="are">are</span> <span word="coal">coal</span>, <span word="gas">gas</span>, <span word="oil">oil</span> <span word="and">and</span> <span word="peat">peat</span> <span word="and">and</span> <span word="create">create</span> <span word="carbon">carbon</span> <span word="when">when</span> <span word="they">they</span> <span word="are">are</span> <span word="burned">burned</span>.化石燃料指的是煤碳、天然气、石油，它们燃烧时会产生碳。</p><p> <span word="Carbon">Carbon</span> <span word="is">is</span> <span word="both">both</span> <span word="necessary">necessary</span> <span word="and">and</span> <span word="dangerous">dangerous</span> <span word="in">in</span> <span word="our">our</span> <span word="world">world</span>.在我们这个世界上，碳既有用也有害。</p><p> <span word="Plants">Plants</span> <span word="and">and</span> <span word="trees">trees</span> <span word="need">need</span> <span word="carbon">carbon</span> <span word="dioxide">dioxide</span>, <span word="CO">CO</span>2, <span word="to">to</span> <span word="breathe">breathe</span>.植物和树木需要呼吸二氧化碳。</p><p> <span word="Carbon">Carbon</span> <span word="monoxide">monoxide</span>, <span word="CO">CO</span>, <span word="however">however</span>, <span word="is">is</span> <span word="poisonous">poisonous</span> <span word="to">to</span> <span word="us">us</span>.一氧化碳却对我们有害。</p><p> <span word="When">When</span> <span word="carbon">carbon</span> <span word="and">and</span> <span word="other">other</span> <span word="elements">elements</span> <span word="get">get</span> <span word="into">into</span> <span word="the">the</span> <span word="air">air</span>, <span word="they">they</span> <span word="mix">mix</span> <span word="with">with</span> <span word="water">water</span> <span word="in">in</span> <span word="the">the</span> <span word="clouds">clouds</span>.碳和其他的元素进入空气时，便与云层里的水分混合。</p>
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