On Monday, May 23, 2022 at 11:42:47 PM UTC+8, David P. wrote:
> How much do volcanoes contribute to global warming?
> By Maggie Astor, New York Times
>
> Volcanic activity generates 130 million to 440 million tons
> of carbon dioxide per year, according to the United States
> Geological Survey. Human activity generates about 35 billion
> tons of carbon dioxide per year — 80 times as much as the
> high-end estimate for volcanic activity, and 270 times as
> much as the low-end estimate. And that’s carbon dioxide.
> Human activity also emits other greenhouse gases, like methane,
> in far greater quantities than volcanoes.
>
> The largest volcanic eruption in the past century was the
> 1991 eruption of Mount Pinatubo in the Philippines; if an
> explosion that size happened every day, NASA has calculated,
> it would still release only half as much carbon dioxide as
> daily human activity does. The annual emissions from cement
> production alone, one small component of planet-warming human
> activity, are greater than the annual emissions from every
> volcano in the world.
>
> There is also no evidence that volcanic activity has increased
> over the past 200 years. While there have been more documented
> eruptions, researchers at the Smithsonian Institution’s Global
> Volcanism Program found that this was attributable not to an
> actual trend, but rather to “increases in populations living
> near volcanoes to observe eruptions and improvements in
> communication technologies to report those eruptions.”
>
> All told, volcanic activity accounts for less than 1% of
> greenhouse gas emissions, which is not enough to contribute
> in any meaningful way to the increase we’ve seen over the past
> 200 years. The Intergovernmental Panel on Climate Change found
> in 2013 (see Page 56 of its report) that the climatic effects
> of volcanic activity were “inconsequential” over the scale of
> a century.

Volcanoes are natural hot warming pollutants from the air and undersea, too.. But warplanes and jet fighters from the USAF flying around its hundred of bases are the biggest polluters contributing to the biggest global warming.. But so far US pretends nothing of that contributed to it.