USGS warns of poisonous gas emissions in National Park

Yellowstone volcano is the subject of much speculation over whether there will be a major eruption in the future - but now National Park’s authorities have a more pressing issue to worry about as experts warned of toxic gases venting from the supervolcano.


Yellowstone National Park is home to thousands of hot springs and geysers spewing clouds of mostly harmless, rotten-smelling gases.

But in the deeper parts of the Yellowstone wilderness where tourists are told not to stray, toxic fumes of lethal gas are powerful enough to kill.

USGS scientists studying the Yellowstone volcano have warned of the ever-present danger in the latest issue of the weekly Yellowstone Caldera Chronicles.





USGS expert Jennifer Lewicki, who is based in California’s Menlo Park, said dozens of Yellowstone animals have dropped dead over the years as a result of inhaling toxic fumes.