Centre file no.
Fly ash, the residue from burning low-grade coal in generating plants, and sewage sludge are produced in enormous quantities in India. Both waste materials are deposited largely untreated directly into the water systems. This results in siltation, flooding, and contamination of sources of water for millions of people. The environmental, economic, and social costs associated with waste disposal are considerable, and will continue to increase as population and industrial activities grow. Research by Indian and Canadian scientists at the University of Western Ontario has demonstrated the use of waste mixtures to enhance soil fertility and structure, and increase survival and growth rates of woody perennials and grasses.