Installation of seawater desalination plants; repair of seawater desalination plants; repair and maintenance of seawater desalination plants; installation and repair of water filtering apparatus; repair and maintenance of water purification apparatus; repair or maintenance of water purification apparatus; construction engineering services; repair of buildings; demolition work on buildings; factory construction; installation and repair of irrigation devices; construction of bridges; construction of dams and water storage facilities; construction of roads; road paving; construction of building for office; construction of sewers and water supply systems; installation of electric installations; construction of houses; construction of telecommunications apparatus; construction of waste disposal facilities; construction of environmental basic facilities; construction of water treatment facilities; construction supervision; construction of sewage treatment facilities; park construction; plumbing; reinforced concrete work; washing of machine installations; cleaning of heating and cooling machines and apparatus; rustproofing; building rust removing; cleaning of water tanks; disinfecting; cleaning of industrial premises; storage tank cleaning; boiler cleaning; cleaning of gullies; repair of plumbing systems; waste disposal for others [cleaning service]; installation of air pollution control facilities; construction of new regeneration energy materials; construction of new regeneration energy factory; construction of new regeneration energy factory, including sunlight generation or wind power; maintenance of facilities; construction of machine installations; management of public water supply or drainage system for others; construction of civil engineering works; management of measuring apparatus for others; management of personal sewage treatment facilities; construction of recycled PET facilities; maintenance of recycled PET facilities; construction of solid refuse fuel manufacturing plant; maintenance of solid refuse fuel manufacturing plant; construction of power plants; maintenance of power plants; maintenance of water quality management facility; maintenance of new regeneration energy factory; construction of heat supplying facilities; maintenance of heat supplying facilities; maintenance of ordinary industrial wastes treatment facilities (burying); construction of ordinary industrial wastes treatment facilities (burying); maintenance of designated industrial wastes treatment facilities (burying); construction of designated industrial wastes treatment facilities (burying); maintenance of sewer facilities; engineering of environmental basic facilities; management, operation, commissioning and repair of sewage treatment facilities; construction of water pollution control facilities; construction of environmental pollution control facilities; construction of energy-saving power plants; maintenance of energy-saving power plants

Trash collection for others; waste collection

Desalination of water; purification of gases; air purification and deodorizing; rental of air purification apparatus; air freshening; air purification; air deodorizing; purification of industrial waste water; waste water treatment services for industrial purposes; treatment of marine waste; purification of exhaust gases and smoke; rental of septic tanks; human waste treatment; industrial toxic waste disposal; incineration of industrial waste; treatment of high concentration organic wastewater; water treatment for preventing pollution; rental of water purifying apparatus; sludge treatment services; bioremediation services; incineration of waste; sorting of waste and recyclable material; destruction of waste; waste treatment; decontamination of hazardous materials; treatment of hazardous gases; treatment of hazardous substances; destruction of food waste; treatment of waste and harmful substances; waste water reprocessing; treatment of waste water; services for the treatment of sewage; treatment of waste materials relating to environmental pollution control; rental of water purifying apparatus for industrial purposes; rental and providing information relating to water purifying apparatus; treatment of contaminated soil; soil, waste or water treatment services [environmental remediation services]; soil treatment services [environmental remediation services]; treatment of industrial waste; waste processing; treatment of environmental waste; water purification services; water treatment and purification; providing information relating to water treating services; water treating; rental of water treatment equipment; water recycling and desalination services; water demineralization; recycling of water; recycling of hazardous substances; recycling of chemicals; conversion of waste energy into electricity [energy recycling services]; generation of electricity; food and drink preservation; processing of chemical preparations for stabilizing soil; processing of plastics; treatment of harmful chemical substance

Testing services relating to air purification; testing or research services relating to anti-pollution; surveys of atmosphere; environmental testing of exhaust emissions; survey and research of industrial waste; surveys of water quality; testing and research services in the field of preventing pollution; conducting sampling and analysis services to check for contamination; groundwater pollution surveys; soil pollution surveys; research relating to environmental protection; research in the field of environmental protection; environmental impact surveys; water quality control services; measuring and analysis of water quality; measuring and analysis of water pollution; environmental engineering research relating to water analysis; environmental engineering research relating to water treatment; research and development agency of water quality; water quality evaluation; environmental monitoring of waste treatment areas; locating and marking the placement of underground utility pipes, cables or wires; technology services on plant construction; technology services relating to electronic and communication equipment; measuring of atmosphere for others; public surveying; professional design of power facilities; air pollution materials measuring and analysis