how much carbon did mount saint helens release
They also release carbon dioxide, the greenhouse gas that's primarily blamed for global warming. Mount St. Helens produces between 500 and 1,000 tons a day of carbon dioxide, Gerlach estimates. Worldwide, people and their activities pump 26 billion tons of carbon dioxide a year into the atmosphere, he said. The total from volcanoes is about 200 million tons a year â or less than 1 percent of the man-made emissions.