Itisalmostknowntoallthatsmokingisbadforpeople'shealth.Scientificresearchesshowthatsmokingcanleadtoheartdisease,cancerandotherproblem.TheWorldHealthOrganizationsaysdiseaseslinkedtosmokingkillatleasttwomillionfive-hundred-thousandpersonseachyear.

　　Still,manypeoplefinditdifficulttostopsmoking.Onereasonisthatsmokingusuallybecomesahabitualbehaviour,andhabits,whethergoodorbadarenoteasytobegivenup.Anotherreasonistheeffectofnicotine,thesubstancefoundincigarettesworksonpeoplesomewhatasdrugsdo.

　　Measureshavebeentakentohelppeoplekeepawayfromtheharmofsmoking.Inmanycities,smokingisforbiddeninpublicplaces.Thedangerofsmokingiswarnedofeverywhere.Andnewspapersareaskednottopublishadvertisementsforcigarettes.World"NoTobaccoDay"isobservedeveryyearasthebiggestcampaignagainstsmoking.