Pollution from SHIPPING (Việc đi biển) AND OFFSHORE DRILLING (việc khoan dầu ngoài biển) is causing "dead zones"—places without enough oxygen for plants and fish to survive - /səˈvaɪv/. 

-> survivor (n) - a person continues to live, despite nearly dying

-> survival (n) - the state of continuing to live/ exist

Sea is also a MAJOR (main/primary) commercial - /kəˈmɜː.ʃəl/ fishing area and shipping route.

The sea absorbs - /əbˈzɔːb/ the carbon dioxide produced from human activities.

Plants, fish, and corals - /ˈkɒr.əl/ cannot survive in acidic (/əˈsɪd.ɪk/) water.

If you _________ something, you make it less. 

 If you _________ something, you make it the way it was before. 

When you _________ a size or number, you make a guess based on the information available. 

A(n) __________ environment is made up of things that are very different from each other.

Something that is _______  is not likely to change. 

A(n) ________  is an amount of something that can be counted or measured. 

If something ____________ has in size, it has become twice as much or as many.

The ocean is a limitless source of food.

large fish such as cod, tuna - /ˈtuː.nə/, salmon - /ˈsæm.ən/

small fish such as sardines - /sɑːˈdiːn/, anchovies - /ˈæn.tʃə.vi/ (vy)

Ocean needs predators - /ˈpred.ə.tər/ to kill sick and weak fish.

Another way to improve the biodiversity of the oceans is to develop aquaculture (nghề nuôi trồng thủy hải sản)