一、雨水资源 在大自然里,植物和土地也会报复人类对大自然的破坏。2000年入春以来,西北、华北地区连续发生12场扬沙,沙尘暴天气。这种恶劣天气发生时间之早、频率之高、强度之大为50年罕见,主要原由是水土流失、植被破坏、生态环境恶化造成的。生态环 First, the rainwater resources In nature, plants and land will also retaliate to human destruction of nature. Since the spring of 2000, there have been 12 consecutive sand-blowing and dust-storms weathering in northwest and north China. The occurrence of such bad weather as early as the frequency of high intensity of 50 years of rare, mainly due to soil erosion, vegetation damage, deterioration of the ecological environment caused. Eco-ring