1. The over 48,000 orange trees that cover all comers of Seville, Spain, not only fill the city's air with the pleasant smell, or orange blossoms, in spring; they also produce over 16,500 tons of fruit every winter. Though that gives the city the rights to show off for being Europe's top orange-producing city, the fruit is too sour to be consumed fresh. While some are used to make marmalade(橘子酱) and orange liqueur, most of them end up in Seville's landfills. However, that may change soon thanks to an original idea to use the oranges to produce clean energy.
The pilot program is being launched by the city's council and parks department in cooperation with Emasesa, Seville's water supply division. Juice obtained from 38.6 tons of oranges will be left to ferment(发酵) in an existing methane(沼气) facility. The methane released from the liquid will be captured and used to drive a generator to produce clean power. To ensure there is no waste, the orange skins, and peels will be used as fertilizer.
"The juice is fructose (果糖) made up of very short carbon chains, and the energetic performance of these carbon chains in the methane facility is very high," said Benigno López, the head of Emasesa's environmental department. "It's not just about saving money, but we're producing added value from waste."
If successful, by 2023, the city hopes to recycle all the oranges and add the electricity generated back to its power network. In trial runs, 1,000 kilos of oranges created 50 kwh of clean energy—enough to fulfill the daily electricity needs of five homes. The project team estimates that if all the fruit is recycled, it will produce enough energy to power as many as 73,000 residences.
The latest program is among the many initiatives being implemented(实施) across Spain to achieve the country's goal of switching its electricity system to renewable sources by 2050 — and if everything goes according to plan, fully decarbonizing(脱碳) its economy shortly after that.
1.What can we learn about the oranges in Seville from the first paragraph?
A.They are of no value. B.They are tasty when fresh.
C.They are the pride of the city. D.They are the problem for the city.
2.How does the fourth paragraph develop?
A.By giving examples. B.By analyzing cause.
C.By providing statistics. D.By following the time order.
3.What is the author's attitude to the program?
A.Supportive. B.Doubtful. C.Critical. D.Indifferent.
4.What is the best title for the text?
A.Seville Is Turning Waste into Wealth B.Seville Is Seeking Market for Oranges
C.Seville Is Contributing to Global Warming D.Seville Is Dealing with the Electricity Shortage
