Thebiggestproblemwithourenvironmentistheair.ThereisairpollutioneverywhereandthemostpollutedareasseemtobetheUnitedStatesandChina.Therearenowaystogetridofpollution,theonlythingwecandoistodecreasethepollutionrate.FactoriesandCarstodaycausethemostpollution.Wemustshutdownuselessfactories,andspendmoretimewalkingorbikingorusingthebusinsteadofdrivingacarofourown.