People don't know about pollution is very harmful for us because in pollution many harmless chemical are present and now a days new factories and companies are are setup due to this factories and company are global environment it is become polluted so try to control it this pollution by growing a plant as more as because when are environmental strong with plant then we didn't face the pollution problem. and please stop the cutting of trees when you cut the trees carbon dioxide will increase and oxygen will decrease so stop creating a pollution I requested you.