Dormant volcanoes (Arte): spotlight on the ashes. Around sixty metropolises around the globe are threatened by these lava giants.
The students of the region, we see in the documentary, prepare for all eventualities. “Drowning volcanoes are more dangerous,” recalls a young schoolgirl. We don't know when they will wake up. The eruption of Ilopango, ten times more powerful than that of Vesuvius, had consequences 10,000 kilometers away.