of wildlife extinction. in a sense, should 11. WILDLIFE EXTINCTION To solve the problem, both the gov The U. S. is faced with ernment and the citizens should make ef of wildlife extinction. By the end of forts together. The government,most 1600. the number of extinct wildlife spe important of all, needs to take some mea cies was less than ten kinds. But in 1900, sures to control the birth rate so that the number was more than 70 kinds will be more room for wildlife species There is nothing to make a fuss about The citizens, too, should develop their the phenomenon. This is, anyway, a def awareness of environment protection inite result of population growth and en- vironment pollution. With the increase of population, people need more and more land to grow crops and more space to live Thus, there is less and less room in the USA for wildlife to survive. With the rapid development of agriculture and in dustry, the environment is seriously pol luted, which destroys the living condition of wildlife. Therefore, the phenomenon 27