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According to available estimates, forests cover more than one quarter of the world's total area. About sixty percent of these forests are situated in tropical countries. However, these forests are disappearing at a very fast pace. Between 1980 and 1995, an area larger than Mexico had been deforested. This accelerated destruction of forests poses a serious threat to the environmental and economic well-being of the earth. Several studies have demonstrated that natural forests are the single most important repository of terrestrial biological diversity--of ecosystems, species, and genetic...

According to available estimates, only .3% of the total fresh water is usable for the world's entire human and animal populations. Some experts have observed that in the near future, the earth will face severe scarcity of water, resulting in an insufficient amount of water to sustain our ever increasing future needs. Others believe that such pessimistic estimates are unwarranted.

Due to conflicting opinions and data-interpretations, the future levels of scarcity are difficult to accurately forecast. One fact, however, is above controversy: water resources are not evenly distributed. The...