题目内容：

    Imagine an area 34 times the size of Manhattan. Now imagine it covered ankle-deep in plastic waste---- a total of about 19 billion pounds of garbage.  1..

“We're being overwhelmed(淹没)by our waste，”said Jenna Jambeck, an environmental engineer who led the 2015 study that determined this astonishing number. 2., unless something is done to stop the tide of garbage.

Plastic----a widely-used material----has in many ways been a benefit to humans but it has also caused a growing problem. Today, plastics are the No.1 type of garbage found in the sea. Ocean Conservancy, a nonprofit that organizes an annual coastal cleanup event worldwide, said plastic waste makes up around 85 percent of the garbage collected from beaches and oceans.

Ocean Conservancy says plastics are believed to threaten(威胁)at least 600 different wildlife species(物种). 3. ; a growing body of evidence suggests humans are consuming plastics through the seafood we eat. A research suggests some plastics could be poisonous to humans, and could potentially increase the risk of health problems.

4.. At the Economist World Ocean Summit this week, ten nations announced to reduce plastic sea liter as part of UN Environment's CleanSeas campaign. 5.Corporations also have a role, as do individuals. We can start by thinking twice before using single-use plastic products----and when we do use them, we should take care to properly throw them off or recycle.

A. The following is what we should do

B. And it's not just wildlife that's threatened

C. And this figure is likely to double by 2025

D. But it's not just countries that need to do their part

E. By 2050,that figure is expected to rise to 1000 pieces

F. That's how much plastic waste ends up in our oceans every year

G. All of us have an important role to play in dealing with the problems