The purity of our air is being degraded due to positive feedback cycles relating to global warming.
It is expected that as the average temperature increases arounf the world, certain natural occurences could change. For example, tropical storms will have more vicious winds that could lead to significant damage in areas affected.
India could also be impacted by a change in monsoon season, some experts predict it will be even wetter during the rainy season. The counterpart to that is that it could possibly get dryer.
Natural Disasters per Year
Sources: http://makewealthhistory.files.wordpress.com/2010/03/natural-disasters.gif
http://earthobservatory.nasa.gov/Features/RisingCost/rising_cost5.php
http://sadighaderi.blogfa.com/post/2/Poverty-Reduce,-the-Essential-Issue-to-Disaster-Risk-Reduction-in-Developing-and-Poor-Countries