Para. 5 Costa Rica This Central American country has one of the most ambitious programs in the world to preserve the ecological diversity of its tropical rain forests. Much of the country has already been clear-cut, and soil erosion has been extensive. But a series of new environmental laws, together with the creation of parks and nature preserves that cover one quarter of the country, are aimed at protecting Costa Rica's remaining forests.Para.5 Costa Rica This Central American country has one of the most ambitious programs in the world to preserve the ecological diversity of its tropical rain forests. Much of the country has already been clear-cut, and soil erosion has been extensive. But a series of new environmental laws, together with the creation of parks and nature preserves that cover one quarter of the country, are aimed at protecting Costa Rica’s remaining forests