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… other than navigation and to measures of protection, preservation and management related to the uses of those … watercourse which may have effects detrimental to the ecosystem of the watercourse resulting in significant harm to … of natural ecosystems as well as on each of the individual ecosystem components, especially animal and plants species, …

… to inspire and guide the peoples of the world in the preservation and enhancement of the human environment, … of population continuously presents problems for the preservation of the environment, and adequate policies and … Governments and peoples to exert common efforts for the preservation and improvement of the human environment, for …

… other than navigation and to measures of protection, preservation and management related to the uses of those … watercourse which may have effects detrimental to the ecosystem of the watercourse resulting in significant harm to … are imposed when the quality of the receiving water or the ecosystem so requires; (e) at least biological treatment or …

… or eradicate the priority species 15.9 By 2020, integrate ecosystem and biodiversity values into national and local …

… in order to meet environmental needs and to maintain ecosystem services. 2.4. Causes of Low Groundwater Quality …