as the government of India has launched its Swachh Bharat Abhiyaan and Clean Ganga initiatives, it becomes important that everyone take part in such movements in their own localities. You can take any one of the following online courses to get the required knowledge to lead initiatives in water purification at your local level too. http://ankitkhandelwal.in/2015/07/01/become-a-part-of-the-clean-india-drive-through-these-online-courses/