目前 ,无论是发达国家还是发展中国家 ,都不同程度地存在着环境污染和生态破坏这两类环境问题。西方国家曾在工业化过程中轻视了环境保护 ,致使环境公害严重泛滥 ,不得不走“先污染 ,后治理”的路子 ,从而付出了沉重的社会和经济代价。近几十年来 ,我国已经经历了各种类型的环 At present, both developed and developing countries, to varying degrees, have environmental problems such as environmental pollution and ecological damage. Western countries have neglected environmental protection during industrialization, resulting in a serious flooding of environmental pollution. They have to take the path of “pollution first and post-treatment” and thus pay heavy social and economic costs. In recent decades, our country has experienced various types of rings