题目内容：

语法填空,阅读下面短文，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。

Styrofoam is a plastic with a bad reputation.

It cannot be recycled without releasing(释放) dangerous  1.  (pollute)into the air. The U. S. Environmental Protection Agency 2. (say) it is the fifth largest creator of dangerous waste.

Scientists from the U.S. and China have discovered that mealworms can digest plastic. One mealworm can digest a pill-sized amount of plastic a day.

Study co-author Wei-Min Wu says that in 24 hours, the plastic 3. (turn) into carbon dioxide.

Are the worms hurt by 4. (eat)plastic? The study found that worms eating Styrofoam were as  5.  (health)as worms eating bran(糠).

Styrofoam is a light-weight material, about 95 percent air, with very good insulation properties(绝缘性), according to Earthsource.org. It is used in products from   6. (cup) that keep your drinks hot or cold to packaging material 7.  protects items during shipping.

“Solving  8.  problem of plastic pollution is important. Landfill space is becoming limited.”says Wu, a Stanford University environmental engineering instructor.

About 33-million tons of plastic are thrown away in the United States every year. Plastic plates, cups and containers take 9. 25 percent to 30 percent of space in America's landfills. One Styrofoam cup takes more than 1 million years 10. (recycle) in a landfill, according to Cleveland State University.