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
2000 - 413
2001 - 379
2002 - 422
2003 - 360
2004 - 354
2005 - 434
2006 - 401
2007 - 413
2008 - 349
2009 - 327
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