The preservation of parks, wilderness, and wildlife has also aided liberty by keeping alive the 19th century sense of adventure and awe with which our forefathers greeted the American West. Many laws protecting environmental quality have promoted liberty by securing property against the destructive trespass of pollution. In our own time, the nearly universal appreciation of these preserved landscapes, restored waters, and cleaner air through outdoor recreation is a modern expression of our freedom and leisure to enjoy the wonderful life that generations past have built for us.
Those concerns of a national character-such as air and water pollution that do not respect state boundaries, or the national transportation system, or efforts to safeguard your civil liberties-must, of course, be handled on the national level.
We still have too much air and water pollution and we still need to work to reduce it. But we also need to put the problem of pollution into a historical as well as scientific perspective.
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