Waste is a material that no longer serves a purpose and so is thrown away. In some cases what one-person discards may be re-used by somebody else. All wastes are particularly hazardous: If not carefully disposed of, it will have an impact on the environment, whether it be unsightly litter in urban streets or contaminated air, soil or water. But what is equally important about waste is that it is recyclable. For example, if all human, animal and solid wastes are recycled back to soil, then we do not need inorganic fertilizers to maintain the high yields of crops. Today India produces 180 million tonnes of food grains and consumes 13 million tonnes of inorganic fertilizers at a huge cost. Therefore, time has come when we have to look at the waste not merely as an environment polluter but a recyclable material of great potential and energy [login to view URL] India we produce 300 to 400 gms. of solid waste per person per day in town of normal size.