If rivers are not polluted and are allowed to flow in their own way, or sometimes allowed to flood the land, the land will become very fertile and able to produce all kinds of vegetables, trees and plants. The word rasa means “taste.” Actually all rasas are tastes within the earth, and as soon as seeds are sown in the ground, various trees sprout up to satisfy our different tastes. For instance, sugarcane provides its juices to satisfy our taste for sweetness, and oranges provide their juices to satisfy our taste for a mixture of the sour and the sweet. Similarly, there are pineapples and other fruits.