环境污染是人类生产和消费活动所造成的。产业革命前，地广人稀，生产力低，所产生的三废数量少、范围小，对生态平衡影响不大，通过生态系统的自我调节，容易恢复和保持平衡。产业革命后，工农业迅速发展，三废增多，没有经过科学处理就任意排放，超过了生态系统的自我调... Environmental pollution is caused by human production and consumption activities. Before the industrial revolution, the land was sparsely populated and the productivity was low. The amount of three wastes produced was small and the scope was small. It had little impact on the ecological balance. Through self-adjustment of the ecosystem, it was easy to restore and maintain balance. After the industrial revolution, the industry and agriculture developed rapidly, the three wastes increased, and they were discharged without scientific treatment, exceeding the self-adjustment of the ecosystem...