Gợi ý: How the ocean is polluted? Firstly: raw sewage is pumped directly into the sea. Secondly: garbage isdropped into the sea. Thirdly: oil spills come from ships at sea. Next: waste materials come from factories. Finally: oil is washed from the land.
Gợi ý: How the ocean is polluted? Firstly: raw sewage is pumped directly into the sea Secondly: garbage isdropped into the sea Thirdly: oil spills come from ships at sea Next: waste materials come from factories Finally: oil is washed from the land