吃肉会引起气候变化
<p> 吃肉会引起气候变化 <span word="Eating">Eating</span> <span word="meat">meat</span> <span word="contributes">contributes</span> <span word="to">to</span> <span word="climate">climate</span> <span word="change">change</span>, <span word="due">due</span> <span word="to">to</span> <span word="greenhouse">greenhouse</span> <span word="gasses">gasses</span> <span word="emitted">emitted</span> <span word="by">by</span> <span word="livestock">livestock</span>. <span word="New">New</span> <span word="research">research</span> <span word="finds">finds</span> <span word="that">that</span> <span word="livestock">livestock</span> <span word="emissions">emissions</span> <span word="are">are</span> <span word="on">on</span> <span word="the">the</span> <span word="rise">rise</span> <span word="and">and</span> <span word="that">that</span> <span word="beef">beef</span> <span word="cattle">cattle</span> <span word="are">are</span> <span word="responsible">responsible</span> <span word="for">for</span> <span word="far">far</span> <span word="more">more</span> <span word="greenhouse">greenhouse</span> <span word="gas">gas</span> <span word="emissions">emissions</span> <span word="than">than</span> <span word="other">other</span> <span word="types">types</span> <span word="of">of</span> <span word="animals">animals</span>. <span word="It">It</span> <span word="is">is</span> <span word="published">published</span> <span word="by">by</span> <span word="Climactic">Climactic</span> <span word="Change">Change</span>. <span word="Carbon">Carbon</span> <span word="dioxide">dioxide</span> <span word="is">is</span> <span word="the">the</span> <span word="most">most</span>-<span word="prevalent">prevalent</span> <span word="gas">gas</span> <span word="when">when</span> <span word="it">it</span> <span word="comes">comes</span> <span word="to">to</span> <span word="climate">climate</span> <span word="change">change</span>. <span word="It">It</span> <span word="is">is</span> <span word="released">released</span> <span word="by">by</span> <span word="vehicles">vehicles</span>, <span word="industry">industry</span>, <span word="and">and</span> <span word="forest">forest</span> <span word="removal">removal</span> <span word="and">and</span> <span word="comprises">comprises</span> <span word="the">the</span> <span word="greatest">greatest</span> <span word="portion">portion</span> <span word="of">of</span> <span word="greenhouse">greenhouse</span> <span word="gas">gas</span> <span word="totals">totals</span>. <span word="But">But</span> <span word="methane">methane</span> <span word="and">and</span> <span word="nitrous">nitrous</span> <span word="oxide">oxide</span> <span word="are">are</span> <span word="also">also</span> <span word="greenhouse">greenhouse</span> <span word="gasses">gasses</span> <span word="and">and</span> <span word="account">account</span> <span word="for">for</span> <span word="approximately">approximately</span> 28 <span word="percent">percent</span> <span word="of">of</span> <span word="global">global</span> <span word="warming">warming</span> <span word="activity">activity</span>. <span word="Methane">Methane</span> <span word="and">and</span> <span word="nitrous">nitrous</span> <span word="oxide">oxide</span> <span word="are">are</span> <span word="released">released</span>, <span word="in">in</span> <span word="part">part</span>, <span word="by">by</span> <span word="livestock">livestock</span>. <span word="Animals">Animals</span> <span word="release">release</span> <span word="methane">methane</span> <span word="as">as</span> <span word="a">a</span> <span word="result">result</span> <span word="of">of</span> <span word="microorganisms">microorganisms</span> <span word="that">that</span> <span word="are">are</span> <span word="involved">involved</span> <span word="in">in</span> <span word="their">their</span> <span word="digestive">digestive</span> <span word="processes">processes</span> <span word="and">and</span> <span word="nitrous">nitrous</span> <span word="oxide">oxide</span> <span word="from">from</span> <span word="decomposing">decomposing</span> <span word="manure">manure</span>. <span word="These">These</span> <span word="two">two</span> <span word="gasses">gasses</span> <span word="are">are</span> <span word="responsible">responsible</span> <span word="for">for</span> <span word="a">a</span> <span word="quarter">quarter</span> <span word="of">of</span> <span word="these">these</span> <span word="non">non</span>-<span word="carbon">carbon</span> <span word="dioxide">dioxide</span> <span word="gas">gas</span> <span word="emissions">emissions</span> <span word="and">and</span> 9 <span word="percent">percent</span> <span word="of">of</span> <span word="total">total</span> <span word="greenhouse">greenhouse</span> <span word="gas">gas</span> <span word="emissions">emissions</span> <span word="overall">overall</span>. <span word="The">The</span> <span word="research">research</span> <span word="team">team</span>, <span word="including">including</span> <span word="Dario">Dario</span> <span word="Caro">Caro</span>, <span word="formerly">formerly</span> <span word="of">of</span> <span word="Carnegie">Carnegie</span> <span word="and">and</span> <span word="now">now</span> <span word="at">at</span> <span word="the">the</span> <span word="University">University</span> <span word="of">of</span> <span word="Siena">Siena</span> <span word="in">in</span> <span word="Italy">Italy</span>, <span word="and">and</span> <span word="Carnegie">Carnegie</span> <span word="s">s</span> <span word="Ken">Ken</span> <span word="Caldeira">Caldeira</span>, <span word="estimated">estimated</span> <span word="the">the</span> <span word="greenhouse">greenhouse</span> <span word="gas">gas</span> <span word="emissions">emissions</span> <span word="related">related</span> <span word="to">to</span> <span word="livestock">livestock</span> <span word="in">in</span> 237 <span word="countries">countries</span> <span word="over">over</span> <span word="a">a</span> <span word="nearly">nearly</span> <span word="half">half</span> <span word="a">a</span> <span word="century">century</span> <span word="and">and</span> <span word="found">found</span> <span word="that">that</span> <span word="livestock">livestock</span> <span word="emissions">emissions</span> <span word="increased">increased</span> <span word="by">by</span> 51 <span word="percent">percent</span> <span word="over">over</span> <span word="this">this</span> <span word="period">period</span>. <span word="They">They</span> <span word="found">found</span> <span word="a">a</span> <span word="stark">stark</span> <span word="difference">difference</span> <span word="between">between</span> <span word="livestock">livestock</span>-<span word="related">related</span> <span word="emissions">emissions</span> <span word="in">in</span> <span word="the">the</span> <span word="developing">developing</span> <span word="world">world</span>, <span word="which">which</span> <span word="accounts">accounts</span> <span word="for">for</span> <span word="most">most</span> <span word="of">of</span> <span word="this">this</span> <span word="increase">increase</span>, <span word="and">and</span> <span word="that">that</span> <span word="released">released</span> <span word="by">by</span> <span word="developed">developed</span> <span word="countries">countries</span>. <span word="This">This</span> <span word="is">is</span> <span word="expected">expected</span> <span word="to">to</span> <span word="increase">increase</span> <span word="further">further</span> <span word="going">going</span> <span word="forward">forward</span>, <span word="as">as</span> <span word="demand">demand</span> <span word="for">for</span> <span word="meat">meat</span>, <span word="dairy">dairy</span> <span word="products">products</span>, <span word="and">and</span> <span word="eggs">eggs</span> <span word="is">is</span> <span word="predicted">predicted</span> <span word="by">by</span> <span word="some">some</span> <span word="scientists">scientists</span> <span word="to">to</span> <span word="double">double</span> <span word="by">by</span> 2050. <span word="By">By</span> <span word="contrast">contrast</span>, <span word="developed">developed</span> <span word="countries">countries</span> <span word="reached">reached</span> <span word="maximum">maximum</span> <span word="livestock">livestock</span> <span word="emissions">emissions</span> <span word="in">in</span> <span word="the">the</span> 1970<span word="s">s</span> <span word="and">and</span> <span word="have">have</span> <span word="been">been</span> <span word="in">in</span> <span word="decline">decline</span> <span word="since">since</span> <span word="that">that</span> <span word="time">time</span>. <span word="The">The</span> <span word="developing">developing</span> <span word="world">world</span> <span word="is">is</span> <span word="getting">getting</span> <span word="better">better</span> <span word="at">at</span> <span word="reducing">reducing</span> <span word="greenhouse">greenhouse</span> <span word="emissions">emissions</span> <span word="caused">caused</span> <span word="by">by</span> <span word="each">each</span> <span word="animal">animal</span>, <span word="but">but</span> <span word="this">this</span> <span word="improvement">improvement</span> <span word="is">is</span> <span word="not">not</span> <span word="keeping">keeping</span> <span word="up">up</span> <span word="with">with</span> <span word="the">the</span> <span word="increasing">increasing</span> <span word="demand">demand</span> <span word="for">for</span> <span word="meat">meat</span>, <span word="said">said</span> <span word="Caro">Caro</span>. <span word="As">As</span> <span word="a">a</span> <span word="result">result</span>, <span word="greenhouse">greenhouse</span> <span word="gas">gas</span> <span word="emissions">emissions</span> <span word="from">from</span> <span word="livestock">livestock</span> <span word="keep">keep</span> <span word="going">going</span> <span word="up">up</span> <span word="and">and</span> <span word="up">up</span> <span word="in">in</span> <span word="much">much</span> <span word="of">of</span> <span word="the">the</span> <span word="developing">developing</span> <span word="world">world</span>. <span word="Breaking">Breaking</span> <span word="it">it</span> <span word="down">down</span> <span word="by">by</span> <span word="animal">animal</span>, <span word="beef">beef</span> <span word="and">and</span> <span word="dairy">dairy</span> <span word="cattle">cattle</span> <span word="comprised">comprised</span> 74 <span word="percent">percent</span> <span word="of">of</span> <span word="livestock">livestock</span>-<span word="related">related</span> <span word="greenhouse">greenhouse</span> <span word="gas">gas</span> <span word="emissions">emissions</span>, 54 <span word="percent">percent</span> <span word="coming">coming</span> <span word="from">from</span> <span word="beef">beef</span> <span word="cattle">cattle</span> <span word="and">and</span> 17 <span word="percent">percent</span> <span word="from">from</span> <span word="dairy">dairy</span> <span word="cattle">cattle</span>. <span word="Part">Part</span> <span word="of">of</span> <span word="this">this</span> <span word="is">is</span> <span word="due">due</span> <span word="to">to</span> <span word="the">the</span> <span word="abundance">abundance</span> <span word="of">of</span> <span word="cows">cows</span>, <span word="but">but</span> <span word="it">it</span> <span word="is">is</span> <span word="also">also</span> <span word="because">because</span> <span word="cattle">cattle</span> <span word="emit">emit</span> <span word="greater">greater</span> <span word="quantities">quantities</span> <span word="of">of</span> <span word="methane">methane</span> <span word="and">and</span> <span word="nitrous">nitrous</span> <span word="oxide">oxide</span> <span word="than">than</span> <span word="other">other</span> <span word="animals">animals</span>. <span word="Sheep">Sheep</span> <span word="comprised">comprised</span> 9 <span word="percent">percent</span>, <span word="buffalo">buffalo</span> 7 <span word="percent">percent</span>, <span word="pigs">pigs</span> 5 <span word="percent">percent</span>, <span word="and">and</span> <span word="goats">goats</span> 4 <span word="percent">percent</span>. <span word="That">That</span> <span word="tasty">tasty</span> <span word="hamburger">hamburger</span> <span word="is">is</span> <span word="the">the</span> <span word="real">real</span> <span word="culprit">culprit</span>, <span word="Caldeira">Caldeira</span> <span word="said">said</span>. <span word="It">It</span> <span word="might">might</span> <span word="be">be</span> <span word="better">better</span> <span word="for">for</span> <span word="the">the</span> <span word="environment">environment</span> <span word="if">if</span> <span word="we">we</span> <span word="all">all</span> <span word="became">became</span> <span word="vegetarians">vegetarians</span>, <span word="but">but</span> <span word="a">a</span> <span word="lot">lot</span> <span word="of">of</span> <span word="improvement">improvement</span> <span word="could">could</span> <span word="come">come</span> <span word="from">from</span> <span word="eating">eating</span> <span word="pork">pork</span> <span word="or">or</span> <span word="chicken">chicken</span> <span word="instead">instead</span> <span word="of">of</span> <span word="beef">beef</span>.</p>
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