According to "Growing Greener Cities", a book published in 1992 by the American Forestry Association concluded the average cost of a single tree would be as follows $73 worth of airconditioning (4090 pesos) $75 worth of erosion control (4202 pesos) $75 worth of wildlife shelter (4202 pesos) $50 worth air pollution reduction (2801 pesos). Compounding this total of $273 for fifty years at 5% interest results in a tree value of $57,151 (3.202 million pesos)