Environmentalproblemsarebecomingmoreandmoreseriousallovertheworld.Forexample,carshavemadetheairunhealthyforpeopletobreatheandpoisonousgasisgivenoffbyfactories.Treesonthehillshavebeencutdownandwastewaterisbeingpouredcontinuouslyintorivers.Furthermore,whereverwegotoday,wecanfindrubbishcarelesslydisposed.Pollutionis,infact,threateningourexistence.Theearthisourhomeandwehavethedutytotakecareofitforourselvesandforourlatergenerations.Fortunately,moreandmorepeoplehaverealizedtheseproblems.Measureshavebeentakentocopewiththeseproblemsbythegovernment.Lawshavebeenpassedtostoppollution.Ihopetheproblemwillbesolvedinthenearfutureandourhomewillbecomebetterandbetter.Toeveryoneonourplanet,Overthepastyears,floods,droughts,landslides,anddust-stormshavefrequentedourplanet,theonlyhabitatofhumanbeings.Severaldaysago,tsunami(海啸)hasswepttheSoutheastAsia,whichhascausedenormousdamage.Allthesehavesoundedanalarmtohumanbeings.Thedestructionwhichiscausedbyhumanbeingshasarousedpeople’sconcernallovertheworld.Ifwepaynoheedtothepresentdestructivehumanactivities,ourplanetwillbecomeoftombinsteadofcozyhome.What’smore,weshouldrealizethatonlyfromourplanetcanweobtainoursheltering,food,clothandsoforth.Counter-measuresmustbetakentocurbthedestructioncausedbyhumanbeings.Mostimportantly,lawsmustbeestablishedtopunishthosewhoareinvolvedindestructiveconducts.