政策环境影响评估是高层次的战略环境影响评价,指对政策制定以及政策实施后可能造成的环境影响进行分析、论证、预测和评估,提出预防、减轻和控制不良环境影响的对策和措施,并进行跟踪监测和控制的方法和制度。它对于环境保护的意义十分深远。目前,北京面临严峻的人口、资源、环境危机和功能转型、区域协同发展等诸多挑战,生态文明建设 Policy Environmental impact assessment is a high-level strategic environmental impact assessment. It refers to the analysis, demonstration, prediction and assessment of the environmental impacts that may be caused after policy formulation and policy implementation, and puts forward countermeasures and measures to prevent, mitigate and control the adverse environmental impacts. Methods and systems for follow-up monitoring and control. Its significance for the protection of the environment is very far-reaching. At present, Beijing is facing many challenges such as severe population, resources, environmental crises, functional transformation and coordinated regional development. The construction of ecological civilization