Biogeogens and Human Health
Health of the people is the most important indicator of the development of a nation. Health is a state of complete physical, mental and social well being and not merely the absence of disease or infirmity (as defined by WHO). The state of health of an ind
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Niraj Kumar
Biogeogens and Human Health
SpringerBriefs in Public Health
For further volumes: http://www.springer.com/series/10138
Niraj Kumar
Biogeogens and Human Health
123
Niraj Kumar Science and Society Division Institute of Applied Sciences (IASc) Allahabad Uttar Pradesh India
ISSN 2192-3698 ISBN 978-81-322-1083-2 DOI 10.1007/978-81-322-1084-9
ISSN 2192-3701 (electronic) ISBN 978-81-322-1084-9 (eBook)
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Foreword
The sustenance and renewal of life in an ecosystem depends mainly on two factors, energy cycling and nutrient flow. Nitrogen cycle and nitrogen fixation are perhaps the best examples of nutrient cycling. Nutrient cycling involves elements moving to/from biotic and abiotic factors in the ecosystem. Energy movement through food chain in biotic factors is an important example of energy flow. Energy is either transformed or conserved. Plants and some other organisms convert solar energy to chemical energy via photosynthesis which occurs in two parts: light-dependent reactions and dark reactions. The light-dependent reaction happens when solar energy is captured to make adenos
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