Excerpt from Clean Air Protection Problems at National Parks and Wilderness Areas: Hearing Before the Environment, Energy, and Natural Resources Subcommittee of the Committee on Government Operations, House of Representatives, One Hundred Third Congress, Second Session, April 29, 1994
Finally, 4 years ago we criticized epa for having failed - since 1980 - to issue regional haze regulations, the only effective method for controlling visibility problems.
Well, here we are 4 years later. What has changed since 1990?
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