Instruct: Classify Amazon reviews into positive or negative sentiment
Query: The simgle most important book on man and nature.

A Sand County Almanac takes the spirit of Thoreau's Walden and translates into modern, pragmatic language. Leopold's "Land Ethic" is the basic principle on which all responsible conservation action should take place. The "Ecological Conscience" which forms from affinity with the land is a key to human health, as well as ecological harmony. If you want to read one book about what living in harmony with nature is, this is it.