Heavy industry, manufacturing and agriculture are three of the major causes of pollution of the Great Lakes system. The production of persistent organic pollutants (POPs) such as PCBs, DDT and dioxins, had previously been of principal concern. This does not account for all of the pollution, but are a majority of the blame. Chemical pollution, Plastic pollution, and Nutrient pollution have been devastating to The Great Lakes.
The causes of freshwater pollution are varied and include industrial wastes, sewage disposal, runoff from farmland, cities, and factory effluents, and the build-up of sediment. Emissions from factories and vehicles are released into the air.
Therefore, answers should be:
Industrial waste, sewage disposal and, runoff.
Answer:
computer algebra system
Explanation:
that is you made a typo for cas thats the only thing ive heard of
I would say the last option students who bring weapons to school are acting on the rage they feel as victims of harassment.
Answer:
Avoiding caffeine and liquids before bed, especially alcohol if you're already tired. Turning off any surrounding lights or sounds. Avoiding stimulating activities before bed. Keeping your bedroom at a comfortable temperature.
