【单选题】Energy use and air pollution have been synonymous in China for decades, especially in urban areas.【66】Fifteen or 20 years ago in China's northern cities, such as Shenyang, air pollution was characteri...
A.
Thus, a secure, flexible, and varied energy-supply policy is critical to continued growth.
B.
The new legislation, which went into effect September 1, 2001, calls for the regulation of transportation, as well as residential and commercial energy use.
C.
In rural areas, air pollution is also common because a significant amount of industry that is highly dependent on coal is located in the countryside.
D.
China is undergoing urbanization and industrial development on an unprecedented scale.
E.
This may be because vehicles in Beijing tend to be new and have fairly efficient combustion systems.
F.
A good deal of progress has been made in China since the mid-1990s. (66)