Haagen-Smit A J
Proc Natl Acad Sci U S A. 1970 Oct;67(2):887-97. doi: 10.1073/pnas.67.2.887.
The history of air pollution control in the Los Angeles area shows a gradual transfer of authority from city and county to state and federal government. The relative role of the various levels of government is discussed. Regional control will become increasingly important with standards set or approved by state and federal authorities. Progress is noted in the control of both stationary and moving sources, but long-range planning of the development of our urban complex with an overriding regard for its effect on the environment is needed if the technological innovations are to keep pace with the demands of an ever-increasing population.
洛杉矶地区空气污染控制的历史表明，权力逐渐从市和县转移到州和联邦政府。文中讨论了各级政府的相对作用。随着州和联邦当局制定或批准的标准，区域控制将变得越来越重要。在固定源和移动源的控制方面都取得了进展，但如果技术创新要跟上不断增长的人口需求，就需要对我们城市综合体的发展进行长期规划，并首要考虑其对环境的影响。
