Hi Poonam
To give you a slogan, you need to give a background as to what environmental concerns are to be addressed, who is the target audience and what kind of impact you want to have.
However since you sound a little desperate here are a few slogans
What matters is WATER matters !
You can recycle waste - you cant waste your life cycle !
Recycle waste OR waste your life cycle !
When you litter - you breed death
When animals litter - they breed life !
What kind of animal are you ???
Trust I have addressed some of your anxiety.
If interested in more Inspirational and Motivational inputs with practical application, you are invited to visit the following blogs
www.actspot.wordpress.com - Daily Blog
www.poweract.blogspot.com - Weekly Blog
Best Wishes
Jacob
www.actspot.com - Website