Thewaywecookisimportant．Inmanycountries，thetwochoicesare（61）___（nature）gasorelectric-poweredstoves．TheWorldHealthOrganizationwarnsthatmillionsofpeople（62）___（suffer）fromindoorairpollutionatpresent

　　Thewaywecookisimportant．Inmanycountries，thetwochoicesare （61）___ （nature） gasorelectric-poweredstoves．TheWorldHealthOrganizationwarnsthatmillionsofpeople （62）___ （suffer） fromindoorairpollutionatpresenttime，whichresultsfromtheuseof （63）___（danger） fuelsandcook-stovesinthehome．WHOofficialssaynearlythreebillionpeopleare （64）___（able） tousecleanfuelsandtechnologiesforcooking，heatingandlighting．Asaresult，morethansevenmillionpeoplediefromexposuretoindoororoutdoorairpollutioneachyear．Mostofthedeathsarein （65）___ （develop）countries，suchasIndia，ChinaandLatinAmericancountries．WHOofficialssayopeningawindowordoor （66）___（let）outtheharmfulairwillnotcorrectthesituation．（67）___willonlypollutetheoutdoors．NigelBruce，（68）___isaprofessorofPublicHealthattheUniversityofLiverpool，saysresearchersaredevelopinggoodcook-stovesandotherequipmenttoburnfuels （69）___amoreefficientway．

　　But，thisisjustastart．Itisurgingdevelopingcountriestouse （70）___ （clean） fuelsandincreaseaccesstocleanerandmoremoderncookingandheatingappliances（用具）．