1 . Styrofoam, or polystyrene, is a light-weight material, about 95 percent air, with very good insulation (隔热) properties, according to Earthsource. org. It is used in products from cups that keep your drinks hot or cold to packaging material that protects items during shipping. With the above good features, Styrofoam still enjoys a bad reputation. It cannot be recycled without releasing dangerous pollution into the air. The U. S. Environmental Protection Agency says it is the fifth-largest creator of harmful waste.
But now the common worms which are usually disgusting can come to the rescue, specifically, meal-worms. Scientists from the U. S. and China have discovered that meal-worms can digest plastic. One meal-worm can digest a pill-sized amount of plastic a day. Study co-author Wei-Min Wu says that in 24 hours, the plastic is turned into carbon dioxide.
Since Styrofoam has no nutrition at all, are the worms hurt by eating plastic? Much to the scientists’ surprise, the study found that worms eating Styrofoam were as healthy as worms eating bran (谷糠) . The researchers will study the worm’s eating habits and digesting system, looking to copy the plastic breakdown but on a larger scale. Once the way can be put into practice, it will make a revolutionary difference to the disposal of plastic.
“Solving the issue of plastic pollution is important”, says Wu, a Stanford University environmental engineering instructor. After all, our earth is small and landfill space-is becoming limited with too much garbage waiting to be dealt with, he says.
About 33-million tons of plastic are thrown away in the United States every year. Plastic plates, cups and containers take up 25 percent to 30 percent of space in America’s landfills. One Styrofoam cup takes more than 1 million years to recycle in a landfill, according to Cleveland State University.
1. What do we know about Styrofoam?| A．It can be used to cool drinks. | B．It is a weightless material. |
| C．It is harmful when recycled. | D．It is usually used on ships. |
| A．Meal-worms have amazing digesting power. | B．Meal-worms are not bad in their nature. |
| C．Meal-worms can rescue people’s lives. | D．People misunderstood meal-worms in the past. |
| A．by raising amounts of meal-worms | B．by environmental engineering instructors |
| C．using a method inspired by eating meal-worms | D．without sending out dangerous pollution |
| A．Styrofoam is widely used in daily life. | B．Meal-worms are genius at eating plastic |
| C．Plastic recycling may be no more a problem. | D．Plastic can be turned into carbon dioxide |
With about half of the vast country covered in wilderness, China is the world’s third most species-rich country. Therefore, China’s
The vital biodiversity,
The national parks cross China’s vast ecosystems, from the Hainan Tropical Rainforest National Park in the south
The national parks are open to all. Visitors can make reservations online in advance
