Regional environmental judicial cooperation is an important aspect of the integrated development of regional environmental and resource adjudication.The operation mechanism of regional environmental judicial cooperation lies in the adherence to the ecological environment holism,the practice of the value contained in the judicial rationality and the application of the collaborative theory.At present,the Yangtze River Delta region has made active exploration in regional environmental judicial cooperation,however,there are still some problems such as dissimilation of rule of law practice,lack of ...