Co-author Chris Duerksen says the county was named because of its Placer Legacy and Placer County Conservation Plan which aim to protect delicate habitat.
"They’re purchasing some land, they have development mitigation requirements – if you tear out trees you have to mitigate, if you chew up farm land you have to mitigate. The down side, the program has a lot of promise, it’s not a done deal yet."
The book – titled Nature Friendly Communities – lists Placer County as one of 20 examples of excellent land-use practices in the United States.
But environmentalists with the Sierra Club say it's still too early to tell if the county's conservaton plan will be effective.