When artificial or non - artificial substances, add fertilisers or sewage to a fresh water stream, lake or water body, increasing the amount of nutrients in the water.
Eutrophication is where a body of water somehow acquires an excessive amount of nutrients and as a result, has a boom in biotic life. Eutrophication usually occurs because the Nitrogen-rich...
What happens is that the ecosystem becomes rich with nutrients- therefore making more fertile soil to produce more food which will in turn produce more energy for the animals who eat them and so on.
I assume you are talking about commmunism. Well a German Socialist named Karl Marx wrote a series of books on the subject. The first Communist government was started in Russia. Vladimir Lenin led the...