It is all about consciusness and education, hydroelectrical generation is nowadays not the same thing it used to be, http://www.bbc.com/future/story/20150610-blue-energy-how-mixing-water-can-create-electricity the chemical natural reaction when a river touch the sea(salty water) is a huge source of energy and super clean process.
There will always be the human insterests that slow down these initiatives, but knowledge is power, and if we have in our hand to teach, at least those around us, we will be contribuiting to a healthier enviroment and we will be surrounded by responsable people.