[单项选择] Wind Energy
Wind energy development has been thriving both in the United States and around the world. This reflects not only the declining cost of the resource and the improved performance of wind power plants, but also a growing awareness among utilities and other potential customers that this renewable energy technology offers many benefits for the economy and the environment.
-Wind energy can help create new business and jobs, keep energy dollars circulating in local economies and reduce reliance on imported energy.
-Wind energy can help protect utilities and ratepayers from risks associated with changing fuel prices, new environmental regulations, uncertain load growth and other unpredictable costs.
-Wind energy can reduce a utility’’s pollutant emissions, helping power companies meet environmental regulations and satisfy their customers’’ desire for clean power sources.
In the past, these benefits were not enough t
A. Y
B. N
C. NG
[简答题]It takes energy to make a car, and it takes energy to run it. Energy is expensive, and in short supply. Using energy causes pollution and contributes to global warming. The energy needed by the car’s engine comes from burning its fuel. Car engines are not very efficient. Only about 20% of the energy from the fuel is used to keep the car moving. The rest escapes as waste heat, or is used for the car’s lights, heater, etc.
