DOZENS of Indonesians killed by landslides this spring have paid the price of unchecked development. Many other innocents in developing nations die each year as rampant illegal logging and deforestation denude steep hillsides, loosening soil and allowing heavy rains to create deadly deluges. Such environmental perils are increasingly common across much of the world as native forests are fragmented, waterways polluted, and oceans over-harvested. The onslaught is especially alarming in the tropics, where an area of forest the size of 40 football fields is destroyed every minute.