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自然灾害似乎总是与人类所取得的文明成果相伴而生，我们甚至可以毫不夸张地说：自然灾害就是人类文明成果的“副产品”。我国森林病虫害的发生面积与人工造林面积成正比的快速攀升，不幸证明了这一点。新中国建国５０年来，为改变日益恶化的生态环境，全国各族人民发起了一场
Natural disasters always seem to come with the achievements of civilization made by mankind. We can even say without any exaggeration that natural disasters are “by-products” of the achievements of human civilization. The occurrence area of forest pests and diseases in our country is rapidly increasing in proportion to the area of afforestation, which unfortunately proves this point. In the 50 years since the founding of New China, people of all ethnic groups across the country have initiated a campaign to change the deteriorating ecological environment