6月5日是“世界环境日”,这一天成为世界性保护环境的宣传日和纪念日,至今已30年了。20世纪以来,世界人口猛增。由于过度或不合理地开发利用自然资源而导致的森林锐减、水土流失、土地沙化、物种灭绝等生态破坏问题,以及人类在生产、生活活动过程中向环境排放大量废气、废水、废渣带来的环境污染问题日益严重。 June 5th was “World Environment Day.” This day became the propaganda and commemorative day for the world’s environmental protection. It has been 30 years since. Since the 20th century, the world’s population has soared. The ecological destruction caused by excessive or unreasonable exploitation of natural resources, such as forest loss, soil erosion, land desertification, species extinction, etc., and the release of large amounts of waste gas, waste water, and waste residue from the environment to humans during production and living activities. The problem of environmental pollution has become increasingly serious.