人类环境的保护和改善是影响到世界人民幸福和经济发展的主要问题。
The protection and improvement of the human environment is a major issue which affects the well-being of peoples and economic development throughout the world.
城市园林绿化是保护和改善城市生态环境的重要手段。
Urban landscaping is a chief means to protect and improve urban ecological environment.
重点保护和改善人口与环境资源矛盾尖锐区域的生态环境。
Special attention should be paid to protecting and improving the ecological environment in areas with serious imbalance of human and environmental resources.
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