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Air-breathing fishes have become of great interest in recent years for several reasons in different countries over the world. These include the many adaptations of their respiratory and cardiovascular systems for obtaining oxygen from air and water, adaptation in their food and feeding habits, reproduction and behavior. Also, they are important source of animal protein especially in drought and flood prone areas. At present, air-breathing fishes are gradually introducing in different aquaculture practices like cage culture, waste fed aquaculture etc. Unfortunately, there is no systematic...

Natural resource are bulwarks for lying the future foundation. It is very important to manage our natural resources in order to achieve sustain economic growth. We need to revise our economic thinking to give full value to our natural resources. This revised economics will stabilize both the theory and the practice of free-market capitalism. It will provide business and public policy with a powerful new tool for economic development, profitability, and the promotion of the public good. (Paul Hawken)