题目内容：

    Around 45% of plastic waste is recycled annually in the UK and is on the increase. However, one of the problems with present plastic recycling methods is that you end up with a lower-quality plastic with worse properties （特性）than the original. This means that plastic drink bottles cannot simply be recycled into new drink bottles continuously, but instead are used for other lower-grade products like park benches.

Now, British scientists have developed a new method of chemical recycling. They use lower temperatures and more environmentally-friendly starting chemicals than previous methods to turn plastics back into their constituent chemical molecules （分子）.In this way, they can be used to make new plastics of the same quality as the original.

"Most plastic is now recycled using mechanical methods, where they are transformed into liquids before being made into something new," said a professor named Matthew Jones. "The problem is, melting plastic changes its properties and reduces the quality. Out method of chemical recycling overcomes this problem. Then plastics can be used all over again without losing any properties?"

The researchers are recycling some kinds of plastics, including plant-based PLA, a plastic used for food packaging and PET, which is used for drink bottles. So far, the technology has only been demonstrated on a small range. However, scientists are now working to produce larger quantities of starting chemicals.

"There is no single solution to the problem of plastic waste — the approach has to be a combination of reducing, reusing and recycling. Our method of chemical recycling could allow carbon to be recycled endlessly rather than digging more up from the ground in the form of fossil fuels, or letting it into the atmosphere as a greenhouse gas," said Dr. Paul McKeown from the University of Bath.

1.What is the problem with the present plastic recycling?

A.The quality of recycled plastics declines.

B.Plastic drink bottles cannot be recycled.

C.The amount of plastic waste is increasing.

D.Recycled lower-grade products sell badly.

2.How do scientists recycle plastic waste with the new method?

A.By transforming it into fuels.

B.By heating it into liquid state.

C.By keeping its original properties.

D.By changing its molecule structure.

3.What can we learn from what Dr. Paul McKeown said?

A.Fossil fuels are endless resources.

B.The plastic waste problem has no solution.

C.Recycled carbon leads to greenhouse gases.

D.The chemical recycling is environment-friendly.

4.In which part of the website can we find the text?

A.Business. B.Tech & Science.

C.Lifestyle. D.Arts & Culture