One should politely make his/her friend know about the environment and it's merits to us. we take so many things from our environment and yet not kind to it. littering on streets causes bad smell and ugly look. Moreover, when our enviornment is polluted, we are likely to fall ill. swacch Bharat campaign is one such effort to make India a better place to live. in this campaign people clean dirt themselves as no one but we ourselves are responsible for CHANGE.
thank you. I hope this may help you.