When you think of the icy Arctic Ocean,do you picture cold blue waters,on which float（漂浮）icebergs home to animals and fish not seen elsewhere on the planet？Think again,or rather add 300 billion pieces of plastic（塑料）to your picture.That's the amount of plastic that scientists believe is floating around the Arctic Ocean.Most of the plastic is in the area to the east of Greenland and north of Scandinavia.
Where did it come from？After all,the lands near the Arctic are not really full of people.It turns out that ocean currents are carrying plastic thrown into the ocean all the way to the Arctic.An ocean current is an unending movement of sea water from one point to another.It is caused by several things including heat from the Sun,wind and movement of the Earth.
Many of these plastic pieces seem to have travelled for years before reaching the Arctic.This was worked out by scientists studying the plastic problem after they observed the condition of the pieces.While much plastic floats on top of the water,a lot also may be on the sea floor.
Plastic has been widely used for 60 years on Earth and our careless throwing of plastic things is slowly turning the once perfectly clean Arctic into a dangerous place.Unlike food waste and plant waste,plastic doesn't break down so easily.In fact the United States Environment Protection Organization reports that "every bit of plastic ever made still exists".
What's the effect？Seabirds,sea turtles and other ocean creatures could get hurt and die when they accidentally swallow plastic.Plastic waste affects fishing,affecting people who earn money through fishing.Plastics can let out dangerous poisons（毒物）into the water.These may be swallowed by fish,and when these fish are caught and eaten by people or bigger animals,they could get poisoned too!



What can we learn from the passage？ ______

A. The Arctic Ocean is heavily polluted.
B. The plastic is mostly in the area in the east of Greenland.
C. An ocean current is just caused by the movement of the earth.
D. Much more plastic floats on top of the water.

Which of the following doesn't contribute to the plastic ocean？ ______

A. Humans throw away plastic things at will.
B. Ocean currents carry plastic things everywhere.
C. Plastic can let out harmful things into the water.
D. Plastic is hard to break down.

What does the underlined word "swallow" in the last Paragraph mean？ ______

A. break down.
B. take in.
C. accept.
D. touch.

What's the best title of the text？ ______

A. Are Men to Blame for Plastic Ocean？
B. Arctic Ocean and Its Future!
C. Is Plastic Harmful？
D. Arctic Ocean or Plastic Ocean？