Sanitaion methods need to change

I feel there is need of modifying, reinvesting all the old methods of defecation. See this news The Cheap Solar-Powered Material That Could Solve India's Sanitation Woes http://www.takepart.com/article/2014/12/01/solar-powered-toilets-India I think these researched and developed toilets should reach to needy people now. How long we will only talk about thing and not working on..