Volcanoes

1,900 volcanoes worldwide are considered active. Many are widely unknown, such as Mount Nyiragongo in the Democratic Republic of the Congo. At an altitude of 3500 meters, a hot lava sea boils and bubbles at 1000° Celsius. Every day this volcano spews out as much sulfur dioxide as all the other volcanoes on earth put together. And as if that weren’t enough: 2500 square meter Lake Kivu is right nearby, and huge amounts of carbon dioxide and methane have built up in its depths. Millions of human lives are at stake.