The Sangeang Api volcano in Indonesia began erupting on May 30, vaulting ash, along with tiny particles known as volcanic sulfur aerosols, as high as 65,000 feet into the stratosphere. Dramatic images from the eruption show the mountain exploding like a mushroom cloud…This effect can theoretically offset some of the influence of manmade greenhouse gases, which trap heat inside the atmosphere and warm the planet. But Alan Robock, a professor at Rutgers University in New Jersey and a longtime researcher on volcanic influences on the climate, told Mashable that neither the Sangeang Api eruption nor a previous one at Mt. Semeru, also in Indonesia, put enough sulfur into the stratosphere "to have any climate effect, even like the ones of the past decade."
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