[RayChuang88]

What is interesting is that the Krakatau volcano between Java and Sumatra islands in Indonesia is capable of a something approaching a supervolcano eruption. Look at what happened when Mt. Tambora on Sumbawa Island erupted in 1815--it spewed 15 cubic miles of ash into the atmosphere and caused worldwide crop failures for two years! If Krakatau erupts again with an eruption that spews out 35-40 cubic miles of ash it would cause crop losses lasting 4-5 years, and that could cause a worldwide famine.

[blam]

"If Krakatau erupts again with an eruption that spews out 35-40 cubic miles of ash it would cause crop losses lasting 4-5 years, and that could cause a worldwide famine."

Yup. That could happen tomorrow, millions and millions would die from starvation and the associated violence.