So, human driven climate change is basically all about humans taking Carbon bound up underground and releasing it into the air, right? Well, natural processes can do that, too, and the biggest one is volcanoes.
Volcanoes take stuff stored underground and throw it up high into the atmosphere. Depending on what it is and how much, individual eruptions can affect the climate in the short term by quite a bit.
The volcano you’re talking about was underwater and released a ton of super heated steam into the atmosphere. water vapor is a very strong, but short lived, greenhouse gas. All that extra water vapor could be a contributing factor to a warm year this year.
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