I think this is effect of Global Warming........

For your information please log on to www.wikipedia.com

The predicted effects of global warming on the environment and for human life are numerous and varied. It is generally difficult to attribute specific natural phenomena to long-term causes, but some effects of recent climate change may already be occurring.Raising sea level, glacier retreat, Artic shrinkage, and altered patterns of agriculture are cited as direct consequences, but predictions for secondary and regional effects include extreme weather events, an expansion of tropical diseases,change in timing of sensonal pattern in ecosystem, and drastic economic impact. Concerns have led to political activism advocating proposals to mitigate,eliminate or adapt to it.

The 2007 Fourth Assesement Report by the Intergovernmantal Panel on Climate Change (IPCC) includes a summary of the expected effects.

Adios............Zassssssssssssss