The scientific forces causing megafires that destroy millions of people's lives.
Volcanoes are an active threat to 500 million people who live in their vicinity.
Researchers are beginning to understand more about the earthquakes that threaten cities all over the world.
Tornadoes are becoming more common around the world with global warming being a possible cause.
Researchers study avalanches to detect dangerous areas and limit their impact.
New technology monitors lightning moving through the sky.
Jean-Luc Orabona
Producer
