why the world will end in 2012 ?

There has been a lot of speculation on the supposed end of the world in 2012.

But why??

Some of the reasons could be:-
Global Warming

Scientists have been telling us about the ill-effects of global warming and Al Gore and Leo Di Caprioalso sent us constant reminders of how we should try and use less water and use eco-friendly substances etc. But did we try to effectively follow their advice ?

Constant Catastrophes - (God's Revenge?)

Well, with over a hundred earthquakes, tsunamis, hurricanes, terror attacks, hailstorms, floods, volcanic eruptions, landslides, etc we have a "titanic" reason to worry...

Worldwide Mess

This translates to the major social, political and economic mess that's going on all over the world. Some of the major events that have shook the world and also claimed lives are the Egyptian Revolution, the Libyan Civil War, the Occupy Wall Street Movement, London Riots etc, apart from many other revolutionary movements in various other countries all of which are  indicative of something larger that might be in store for us.

Astrological Predictions
( What! Your doubt our Jyotish Shastra !)

 The world is indeed going to end according to the predictions made by Mayan astrologers, Hindu mythology, the Bible and Nostradamus. All of them suggest the same fate for 2012 i.e. the beginning of the end of the world. The predictions of Nostradamus were accurate with respect to the London Fire of 1966, the II World War and 9/11.

Legendary Deaths - Everybody Important is Dead

2011 is already ending on a mournful note since it has seen the death of a lot of influential personalities. A number of our loved celebs left this world. Steve Jobs died, so did Tiger Pataudi and Amy Winehouse and Dev Anand and Jagjit Singh and Elizabeth Taylor and many others. 

NASA Findings

A few years back leaks had been found in the earth's magnetic poles giving rise to speculations that it would lead to some massive upheaval on the planet. This year again, reports have flown about the shift in the earth poles which gives some reason to believe in the theory. 

-( compiled from MensXP.com and other internet references)