People have plastic trashed the world’s oceans. Our oceans hold 21,000 pieces of plastic for each person on Earth! That is 170 trillion pieces of ocean plastic, unfortunately there is probably much more.

Creek near my home drains into the Mississippi River, and then into the Gulf of Mexico.
I live in the middle of the United States about as far away from an ocean as possible yet the plastic from my neighborhood can easily reach the Gulf of Mexico. A creek 5 blocks from my house runs into the Mississippi River which runs into the world’s oceans. A plastic bottle from Minneapolis finds an easy, but long journey into our oceans. Everywhere on Earth there are rivers and streams carrying plastic trash. Read more at: Oceans littered with 171 trillion plastic pieces – BBC News

These rivers carrying plastic and other trash drain into the Gulf of Mexico.
What are some things you can do? 7 Solutions to Ocean Plastic Pollution – Oceanic Society
1. Reduce Your Use of Single-Use Plastics
START NOW! Wherever you live, the easiest and most direct way that you can get started is by reducing your own use of single-use plastics. Single-use plastics include plastic bags, water bottles, straws, cups, utensils, dry cleaning bags, take-out containers, and any other plastic items that are used once and then discarded.
The best way to do this is by a) refusing any single-use plastics that you do not need (e.g. straws, plastic bags, takeout utensils, takeout containers), and b) purchasing, and carrying with you, reusable versions of those products, including reusable grocery bags, produce bags, bottles, utensils, coffee cups, and dry cleaning garment bags. And when you refuse single-use plastic items, help businesses by letting them know that you would like them to offer alternatives. More ideas here: 7 Solutions to Ocean Plastic Pollution – Oceanic Society
How much plastic is in the ocean? — 5Gyres.org
‘Unprecedented Levels’ of Plastics Entered World’s Oceans After 2005, Study Finds – EcoWatch
Plastic Consumption Could Nearly Double by 2050 Without Ambitious UN Treaty – EcoWatch
But there is good news about oceans also. Read about the historic ocean agreement: The Inside Story of ‘the Largest Conservation Agreement in the History of the World’ – EcoWatch