More than a million tons a year of America's plastic rubbish are not ending up where they should.As many as 1，300 plastic grocery bags per person is landing in places such as oceans and roadways,according to a new study of U.S.
In 2016，the United States generated 46.3 million tons of plastic waste,by far the most in the world.Between 2.7% and 5.3% of that was mismanaged,according to a study in Friday's journal Science Advances. "If you took nearly 2.5 million tons of mismanaged plastic waste and dumped it on the White House lawn,it would pile as high as the Empire State Building," said Jenna Jambeck,an environmental engineering professor.
Previous studies hadn't put the United States among the 10 worst offending nations for plastic waste in oceans.That's because the U.S.Environmental Protection Agency only tracks what goes into official parts of the waste stream such as landfills（废物填埋场）and recycling centers.
"The new study provides a more realistic view of our mismanaged waste," said University of Toronto ecology professor Chelsea Rochman,who wasn't part of the study. "We consume a lot of plastic which then becomes plastic waste.We recycle very little of this material,which is a waste of resources."
"A large but hard to quantify part of the problem involves the 51% of U.S.plastic waste shipped abroad for recycling to countries that routinely mismanage waste," Law said.The situation has been converting since many countries have become more limiting about taking U.S.rubbish imports.American exports of plastic waste have declined dramatically since their peak in 2016.
The government is spending billions of dollars trying to fix the problem,with modernized recycling technology and new business models to reduce waste while urging compulsory recycled content standards for new products and packaging.
"The best thing you can do environmentally is to produce no waste at all." Jambeck said.



What can we know about the plastic waste in America？ ______

A. It is improperly dealt with.
B. It is increasing every year.
C. It is as high as a tall building.
D. It is finding its way into landfills.

What did former studies fail to focus on？ ______

A. How plastic waste is managed officially.
B. Where all plastic waste finally ends up.
C. When plastic waste reaches its peak.
D. Why all plastic waste isn't recycled.

Which of the following can replace the underlined word "converting" in paragraph 5？ ______

A. continuing
B. affecting
C. changing
D. existing

What problem might America face concerning plastic waste？ ______

A. The lack of capital for waste management.
B. The lack of modern technology.
C. The seriousness of waste.
D. The limit of waste exports.