题目内容：

    A way to Turn Plastic Waste into $78 Million of Biofuel

16-year-old Egyptian student Azza Abdel Hamid Faiad, meanwhile, was at work finding a way to make use of waste plastic. The young scientist discovered a catalyst(催化剂) that could turn Egypt’s one million tons of annually waste plastic into a $78 million worth of biofuel each year. She hopes that the development could “provide an economically efficient method for production of hydrocarbon(碳氢化合物) fuel,” and many appear to agree; Faiad has been awarded the European Fusion Development Agreement Award at the 23rd European Union Contest for Young Scientists, and is seeking patents for her discovery.

A Pee(尿)-Powered Energy Generator(发电机) Created by Four Nigerian Teenagers

Four Nigerian teenage girls amazed visitors to the Maker Faire Africa with their pee-powered energy generator. Able to source an impressive six hours of power from just one liter of urine(尿)， the 14-and15-year-olds’ renewable energy generator holds interesting possibilities for providing electricity in remote areas or in disaster zones.

Turning Banana Peels(皮) into Bioplastics

16-year-old Turkish student Elif Bilgin developed her very own technique for turning the ordinary banana peel into bioplastics, a discovery which she hopes could reduce dependence on petrol chemicals and make use of some of the 200 tons of banana peel thrown away daily in Thailand alone. Her development relies on the properties of the starches(淀粉) and cellulose(纤维) found in the outer layer of banana peels, which through a chemical process developed by Bilgin herself, can be transformed into a non-decaying(不腐烂的) bioplastics.

1.What do we know from the first invention?

A.The young student was working in a factory though she is young.

B.The young student’s invention will surely solve the energy problem.

C.The young Egyptian student’s invention is very environmentally friendly.

D.People seemed to have different opinions on the young student’s invention.

2.What is the purpose of Elif Bilgin’s invention?

A.To increase the dependence on nature.

B.To make use of petro chemicals resources.

C.To throw away unnecessary banana peels.

D.To be less dependent on petrol chemicals.

3.What do the three inventions have in common?

A.They all make full use of nature resources.

B.They all try to save a lot of energy.

C.They are unique inventions by the young.

D.They all can be put into use easily.