Question

poster ideas on clean the river ganga campaign

Answer 1

draw a picture of river and draw some people clean the river

Answer 2

Hey you can show the comparison by making two pictures in which u will also tell the importance of cleanliness. In first picture you can show ganga in sad mood and also u can a crying face and people around it throwing dust and all.. and in second u can show people carrying all the garbages from river which make ganga very happy.