Severly
polluted air hovers over the city of Nanjing. China's major cities suffer
some of the worst air pollution in the world. During winter, high-sulfur,
soft coal is used as the principal heating fuel. China's rapidly growing
number of trucks and automobiles promise to worsen an already serious problem.
China's overall energy use continues to expand at a rapid pace. Pollution-linked
lung disease has become a leading source of death in China.