* Sewage and wastewater discharge: Untreated sewage and wastewater from cities and towns can contain a variety of pollutants, including bacteria, viruses, nutrients, and toxic chemicals. These pollutants can contaminate water supplies, harm marine life, and damage coral reefs.
* Agricultural runoff: Fertilizer and pesticides used in agriculture can runoff into waterways and eventually reach the ocean. These pollutants can contaminate water supplies, harm marine life, and create dead zones.
* Industrial pollution: Chemicals and other pollutants from industrial activities can be released into the air and water, where they can contaminate the environment and harm marine life.
* Oil spills: Oil spills from ships and offshore drilling rigs can release large amounts of oil into the ocean. Oil can coat marine life, contaminate seafood, and damage coral reefs.
* Plastic pollution: Plastic trash from land-based sources can wash into the ocean, where it can harm marine life and damage coral reefs.
* Atmospheric deposition: Pollutants in the atmosphere can be deposited into the ocean through rain, snow, and dry deposition. These pollutants can include heavy metals, pesticides, and acid rain.
* Shipping: Oil, garbage, chemicals, plastics, and invasive species can be released or spilled from ships traveling the world's oceans.
It is important to note that while ocean pollution has many significant human impacts, a range of policy changes and solutions are available to greatly reduce it and allow for healthier marine ecosystems worldwide.
