Paul B. Downing

• Air pollution and the social sciences
• Environmental economics and policy
• Handbook of Western Fly Fishing
• International comparisons in implementing pollution laws
• Local service pricing policies and their effect on urban spatial structure
• Opal
• Opal Identification & Value (Rocks, Minerals and Gemstones)
• The economics of urban sewage disposal
• Air Pollution and the Social Sciences
• Local service pricing policies and their effect on urban spatial structure
• Opal & gemstone jewelry
• 環境經濟學與政策