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The main sources of fresh water are as follows : 1) Rain 2) Ground water 3) rivers 4) ponds 5) lakes etc.
Water (H2O) and carbohydrates (starch, sugar: (CH2O)n, with n>>5 ) are hydrogen sources for the humans.
Fruit, Salad, Mushrooms and vegetables are all high in water content.
Sea lakes dam river and ocean
Surface-RainSnowLakesStreamsRiversOceansGround-WatershedsAquifersSprings
various sources of waste are:- 1.domestic sources 2.commercial sources 3.industrial sources 4.agricultural sources 5.clinical/biomedical sources 6.mineral sources 7.nuclear sources
The Secretary of the Treasury is #5 and of agriculture is # 9.
The main sources of water pollution are as follows : 1) sewage 2) Industrial wastes 3) synthetic soaps and detergents 4) fertilizers and pesticides 5) petroleum 6)Heat.
Main sources of water pollution are domestic sewage, industrial discharges, leakages from waste tips, urban and industrial runoff accidents, spillage, explosions, sea dumping operations, oil production, mining, agriculture nutrients and pesticides, waste heat sources, and radioactive discharge THXXX ILY<333
I don't have sources to back this up. 1. A successful agriculture to support the large and increasing habitants of the civilization. 2. The civilization needs to be more powerful in a military aspect than it's neighbors to grow into something grand, like the Roman Empire. 3. Functioning water systems. If they falter so will everything else. 4. Most - if not all - civilizations originated from a single city that was located close to water. 5. Liberty and democracy.
There are six agricultural practices for raising crops . They are as follows:Preparation of soil.Sowing of seedsAddition of manures and fertilizersIrrigation (supply of water)Crop protectionHarvesting
The person get infected by eating the contaminated food or at times water. He becomes ill after 5 to 21 days.