PAIREDREADSavingEnergyExpositoryTextbyVanessaYorkSTRATEGIES&SKILLSAPhotographyCredit:CoverEarthraceConservation.**Thetotalwordcountisbasedonwordsintherunningtextandheadingsonly.Numeralsandwordsincaptions,labels,diagrams,charts,andsidebarsarenotincluded.ComprehensionStrategy:AskandAnswerQuestionsSkill:CauseandEffectVocabularyStrategyHomophonesVocabularyenergy,natural,pollution,produce,renewable,replace,sources,traditionalContentStandardsScienceEarthandSpaceScienceWordcount:1,114**Copyright©TheMcGraw-HillCompanies,Inc.Allrightsreserved.Nopartofthispublicationmaybereproducedordistributedinanyformorbyanymeans,orstoredinadatabaseorretrievalsystem,withoutthepriorwrittenconsentofTheMcGraw-HillCompanies,Inc.,including,butnotlimitedto,networkstorageortransmission,orbroadcastfordistancelearning.Sendallinquiriesto:McGraw-HillEducationTwoPennPlazaNewYork,NewYork10121ISBN:978-0-02-119018-8MHID:0-02-119018-6PrintedintheUnitedStates.123456789DOC151413121110PAIREDREADIntroduction..........................2Chapter1Biofuels...............................4Chapter2HydrogenFuel........................11Conclusion...........................14RespondtoReading.................15SavingEnergy...............16Glossary/Index.......................19FocusonScience.............20byVanessaYorkEssentialQuestionWhataredifferentkindsofenergy?IntroductionFuelisanymaterialthatstoresenergythatcanbeextractedandthenused.Weusefueltorunvehicles,machines,andappliances.Wealsouseittomaketheelectricitythatpowersourhomes,schools,andoffices.Weusegasolinetofuelourcars.2BananaStock/PunchStockPeoplehavebeenusingfossilfuels,suchascoal,naturalgas,andoil,forhundredsofyears.Thesearefuelsthatwefindintheground.Buttherearesomebigproblemswiththem.Fossilfuelscausepollution.Theyalsoproducegreenhousegases.Somescientiststhinkthatanincreaseingreenhousegasesmaybeoneofthecausesofglobalwarming.Fossilfuelsarealsorunningout.Butwhatarethealternatives?Scientistsareworkinghardtocomeupwithsomeanswers.Manytrucksrunondieselfuel,whichi...
