本文针对小城镇的环境污染问题，对现行的排污收费制度、许可证制度、三同时制度、限期治理制度存在的问题和调整内容进行了探讨。
The problems of payment of pollution system , permit system , system of environment protection equipment and project designing , construction and using at the same time , and system of governance at limit time are discussed in the text .
限期治理制度