Hi Poonam,
In Telugu:
Yentralanu savarinchu vyardhalanu niyantrinchu
Paryavaranam lo lopam manavaliki sapam
kalushyanni nivarinchu bhavitaranni batikinchu
In English:
Who lives if the environment dies and dies if the environment lives.
Earth is the finest in the universe; let us protect our mother earth.
The environment is your guide, prosperity is your pride.
Also, please search on 'Google' and find "Environment slogan"; then you will find a lot of slogans.
Thanks & Regards