Guide to global catastrophes - non-Flash version

Giant asteroid impact

Collision with an asteroid 1-1.5 kilometres in diameter could result in the deaths of a quarter of the world's population.
Volcanic super-eruption

Following the Toba super-eruption 74,000 years ago, the world would have been held in the grip of volcanic winter for at least six years.
Catastrophic earthquake

The next great Tokyo earthquake is expected to cause damage totalling at least $7 trillion and may trigger a global economic collapse.
Mega-tsunami

When the volcano on La Palma (Canary Islands) collapses into the sea, the coastal cities of the eastern USA will be battered by tsunamis up to 50 metres high.
Global warming

By the end of this century the Earth is predicted to be hotter than at any time in the past 150,000 years. What is happening? What are the solutions?
Global cooling

Just 600 human generations have passed since the end of the last Ice Age. And the planet might well be primed for a return to full ice age conditions sooner than we think.