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Dr. Smil is the world's authority on nitrogenous fertilizer.The industrial synthesis of ammonia from nitrogen and hydrogen has been of greater fundamental importance ...
Around 60,000 years ago, a man genetically identical to us lived in Africa. Every person alive today is descended from him. How did this ...
Medicinal plants of the world is an scientifically accurate guide to the best-known and most important medicinal plants, including those of special commercial or historical ...