Pollution...
 
 
- Is a negative change in the natural environment, which appears partly or totally as a by-product of human actions and the abundance of living species
 - the accelerated input, from anthropogenic action, of nutrients, (especially phosphorus and nitrogen), some organic compounds, (e.g. waste and effluents) and inorganic compounds (e.g. pesticides, heavy metals, hydrocarbons) into the lake
  
  
  
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