Water pollution results from harmful industrial processes and households, from pesticides, fertilizers and other chemicals used in agriculture, from waste disposal sites, substandard sewage treatment plants and also from ships, oil wells and rigs. Also concentrations of heavy metals, such as mercury, cadmium, lead, or copper are increasing.
If we want to have claener waterways, some measures must be taken.
• discharges to watershould be controlled
• the number of sewage treatment plants should be increased
• we should find new technologies which would
• save water
• reduce the amount of chemicals
• develop environmentally friendly pesticides
• pollution occuring from waste silage effluent or slurry, leaking and enterng watercourses, should be minimized or stopped. To prevent nitrate from leaching into water, farmers can grow "green cover" crops in the autumn to take up residual nitrogen.
• oil discharges and dumping of land-generated waste should be controlled
• chemical spills from ships at sea must be dealt with by chemical dispersants spread onto it from specially equiped aircrafts.
Soil
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