20.18 本次级方案致力促成实现的宗旨是改善整个欧洲经委会区域的环境治理和环境绩效，以保护环境，保障人类健康。
20.18 The objective, to which this subprogramme contributes, is to improve environmental governance and performance throughout the ECE region for safeguarding the environment and human health.