Once you will be successful to spread awareness in public mind, you will have to do nothing to make others aware on this as they are also a part of public.
There are many ways to make the public aware on How to save water topic and make them warn about the current situation of water on earth.
Currently Social Medias are the big media to discuss anything or to spread anything to the public in all over the world, you can take help of some famous social media like, Facebook, Instagram, LinkedIn, Twitter and so many more.
Or, you can simply talk in public functions, publish banners, contact social organizations working on the same topic to spread awareness to save water in public.
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