Organic(有机的)farmingisatypeofagriculturethatbenefitsfromtherecyclinganduseofnaturalproducts.Useofdriedplantsnotonlysavesmoney，butalsoensuresthegrowthofcrops.Thetechniqueischaracterized(具有…的特征;)by
Organic(有机的)farmingisatypeofagriculturethatbenefitsfromtherecyclinganduseofnaturalproducts.Useofdriedplantsnotonlysavesmoney，butalsoensuresthegrowthofcrops.Thetechniqueischaracterized(具有…的特征;)bytheuseofgreenmanure(肥料)，biologicalpestcontrolmethodsandspecialfarmingtechniquestokeepsoilproductivity.Limitingtheuseofmanmadechemicalsorcompletelydoingawaywith(去掉)themreducestheriskofdiseases.Today，organicfarmingisamajorandpreferredindustryaroundtheworld.Organicallygrownproductshaveahugemarket，withfarmlandscoveringabout10%ofthetotalworldfarmlandcover.The_hard_work_of_Sir_Albert_Howard，the_Father_of_Organic_Farming，has_paid_off．
AdvantagesofOrganicFarming：
1．Theeconomicsoforganicfarmingarecharacterizedbyincreasingprofits(利润)throughreducedwateruseandreducedsoilerosion(侵蚀)．
2．Organicfarmingproducesthesamecropsasthoseproducedthroughtraditionalfarmingmethods，butuseshalftheenergy，andholds40%moretopsoil.
3．Farmingtheorganicwayenablesfarmerstogetridofweedswithouttheuseofanychemicals.
4．Theuseofgreenpesticides(杀虫剂)isenvironmentallyfriendlyanddoesnoharmtohuman'shealth.
DisadvantagesofOrganicFarming：
1．Organicmethodsoffarmingproduceless，comparedtotraditionalfarmingtechniques.
2．Organicagriculturedoeslittletofightglobalclimatechange.ThoughorganicfarmingpracticesarerecognizedasgivingoutlessCO2，butnottoasignificantdegree.
3．However，thoughtherearesomedisadvantagestoorganicfarming，farmswhereorganicmethodsforcroppinghavebeenusedhavemoreadvantagesthantraditionalfarms.Organicagricultureissurelybetterinthelongterm.
()21.Organicfarmingusesthemanuremadefrom________．
A．expensivesoil B．driedplants
C．harmfulpests D．manmadechemicals
()22.TheunderlinedsentenceinParagraph1showsthatSirAlbertHoward________．
A．workedhardfornothing B．succeededinorganicfarming
C．spentallhistimeonorganicfarming D．didn'texpectorganicfarmingtobe