The health of rivers, lakes, estuaries, coastal systems as well as marine resources is threatened world-wide by water pollution issues, such as eutrophication, toxics (pesticides, POPs), heavy metals, acidification and siltation. Their main effects are ecosystem dysfunction, loss of biological diversity, alteration of aquatic habitats and contamination of downstream and marine ecosystems. Ecosystem impacts are similar in polluted aquatic ecosystems world-wide, and are particularly acute near centres of human activities.
Economic Response: "Recently, the emphasis of policy regarding water pollution has shifted towards environmental management, using incentives, cost- effective strategies and improved performance to achieve sustainability. (8)
Social Response: "Public participation in water resources protection is slowly gaining attention and is usually favored by a decentralised approach based on regional units". (8)