Global Warming and consequent Climate Change is the new and most talked about subject of the present day. It has become the most threatening issue for the very sustenance of life on this planet. This volume includes selected papers from the national Seminar on 'Global Warming and Climate Change: Issues and Challenges in 21st Century India' held at Suri Vidyasagar College, Birbhum, West Bengal, India in November, 2010. Climate Change and impact of on environment, biodiversity and marine resources is reflected upon in details as these are seen to emerge as the most affected sectors. The effects on Stratospheric Ozone depletion, Reducing Air quality, Depleting Water levels, effects on Forestry as also Biodiversity are seen to be alarming. This volume touches upon these core issues that have emerged during the last few decades.