One out of three people in the world is exposed to earthquakes, a number which almost doubled in the past 40 years. Around 1 billion in 155 countries are exposed to floods and 414 million live near one of the 220 most dangerous volcanoes. The 2017 edition of the Atlas of the Human Planet looks at the exposure of people and built-up areas to the six major natural hazards, and its evolution over the last 40 years.
