TheEconomist视频笔记：Butafewhundredyearsagothisdynamicequilibriumwasknockedoutofkilter.（inastateofnotworkingwell）HumanactiontookasledgehammertotheEarth’sdelicatelybalancedcarboncycle.大锤猛击Tobringatmosphericcarbonlevelsdown,humansneedtobuildsystemsthateithercreateanewsinkoramplifytheactionsofanoldsink.Thesearecallednegative-emissionschemes.Directaircapture:Mechanicalsystemssuckcarbondioxideoutoftheatmosphere.Thecarbonistheneitherstoredundergroundorreusedtomakefuelortomakenewrock.Atsomepoint,humanswillstopburningfossilfuels,eitherbychoiceorbyforce.Bythetimethathappens,theworldwilllookverydifferenttowhatitdoesnow.冰岛CCS项目“Orca（虎鲸）”设备利用风扇将空气吸入（snag）装有过滤材料的收集器（chemicalfilters），当过滤材料“吸饱”二氧化碳后，设备将进行升温，最终将从空气中“吸取”的二氧化碳注入到地下多米处，在高压下二氧化碳能够在两年内转化为石头状固体，在地下实现永久封存。冰岛基岩（bedrock）几乎全部由玄武岩（basalts）组成，其中含有的矿物质与二氧化碳反应形成碳酸钙（calciumcarbonate），其转化为岩石（石灰石）。试验表明冰岛玄武岩可在两年内将二氧化碳封存在坚硬的岩石中。on/inthecardsIfyousaythatsomethingisonthecardsinBritishEnglish,orinthecardsinAmericanEnglish,youmeanthatitisverylikelytohappen.revupIfyourevsomethingup,orifitrevsup,itbe