A poll led by the Pew Global Attitudes Project has canvassed more than 48,000 people from all different cultures, religions and nationalities to discover what they believe to be the greatest current threats facing humanity in the 21st century.

People from 44 different countries were given a list of potential threats and asked to name which of these constituted their greatest fears for the human race, answering the question:

"Which one of these poses the greatest threat to the world?"
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Despite the frantic efforts of nuclear engineers, there has been a second explosion in the Fukujima Nuclear Power Station as an explosion has taken place in the third of the six reactors in the system. It is not yet known exactly what caused the explosion or what sort of radiation release, if any, is involved. While some of the radioactive fuel rods in the cores of the reactors have been damaged, there is as yet no evidence of a core meltdown with its consequent massive radiation release. So far, there radiation danger is not high except within the immediate area of the reactor station.
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