阅读理解。
Leading scientists have joined the growing chorus of concem ( worry) about govemments and companies
rushing into producing biofuels (生物燃料 ) as a solution for global warming, saying that it could be harmful if
they do not consider the long-term influence of what they are doing carefully.
It is necessary to build standards for the supply system of any green fuel project in order to make sure that
there aren't any side effects on the environment and social structures. The report produced by the scientists
expresses concem that many companies may not be fully aware of the possible disadvantages.
Production of crops (农作物) , such as com and soya beans, has increased greatly in the last few years as
another eco-friendly choice to natural fuels, but environmental and human rights movement leaders are worried
that this will lead to destruction (破坏) of rain forests. Food prices could also go up as there is increasing
competition for crops as both food and sources of fuels. Last week, the UN wamed that biofuels could have
dangerous side effects and said that steps need to be taken to make sure that land chosen to grow biofuels
does not damage the environment or social structures. There is already great concem about palm oil (棕榈油) , which is used in many foods in addition to being an important biofuel, as rain forests are being cleared in
some countries and people driven from their homes to plant more palms.
The report suggests that biofuels are not a solution for climate change but they can play their ptut as long
as govemments and companies manage the social and environment influence thoroughly. There should also be
greater measures (措施) taken to increase the effectiveness and to reduce needs.
1. The underlined phrase "side effects" probably means _____ .
A.improving conditions
B．unwanted results
C. increasing influences
D. unchanged advantages
2. The third paragraph is mainly about____.
A. the danger of rain forests
B. the waming given by the UN
C. the green biofuels liked by people
D. the possible disadvantages of biofuels
3. What can we infer from the passage?
A. The development of biofuels will probably influence people's daily life.
B. Greater measures should be taken to reduce the amount of biofuels.
C. Almost all the companies are worried about the future of biofuels.
D. Rain forests are being cleared to grow more palms as biofuels.
