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Environmental technology or "green technology" is the application of the (Special:Userlogin)environmental sciences (http://en.wikipedia.org/wiki/Environmental_science) to conserve the natural environment (http://en.wikipedia.org/wiki/Natural_environment) and resources, and by curbing the negative impacts of human involvement. Sustainable development (http://en.wikipedia.org/wiki/Sustainable_development) is the core of environmental technologies. When applying sustainable development as a solution for environmental issues, the solutions need to be socially equitable, economically viable, and environmentally sound.
Some environmental technologies that retain sustainable development are; recycling (http://en.wikipedia.org/wiki/Recycling), water purification (http://en.wikipedia.org/wiki/Water_purification), sewage treatment (http://en.wikipedia.org/wiki/Sewage_treatment), remediation (http://en.wikipedia.org/wiki/Remediation), flue gas (http://en.wikipedia.org/wiki/Flue_gas) treatment, solid waste management (http://en.wikipedia.org/wiki/Solid_waste_management), renewable energy (http://en.wikipedia.org/wiki/Renewable_energy), and others.