There has been an enormous rise in the researches focusing upon the various challenges and concerns emerging in relation to earth's environment in the last few decades. Some of the major issues are rapid deterioration of the ecosystems and natural resources, pollution, effect of human interference, etc. The important topics covered in this extensive book deal with the key factors in sustaining environment such as management of natural resources, climate variability, agriculture and soil management, efficient use of energy, etc. This book will serve as a reference to a broad spectrum of readers.