Waste incineration; treatment of waste; generation of electrical power; treatment of water, sewage and industrial wastewater; recycling of human waste and sludge; water treating; waste water treatment; generating energy from organic waste and recycling of organic waste; treatment of waste water leachate from final disposal sites; rental of water filtration units for commercial use; rental of equipment for prevention of water contamination, namely, water purifying apparatus; rental of water tr...