[jasonshaev]

It's a bit ... presumptuous ... to assume that scientists that have been studying climate change for 4 decades never considered these possibilities.

In fact, a quick google search: ``` While sulfur dioxide released in contemporary volcanic eruptions has occasionally caused detectable global cooling of the lower atmosphere, the carbon dioxide released in contemporary volcanic eruptions has never caused detectable global warming of the atmosphere. All studies to date of global volcanic carbon dioxide emissions indicate that present-day subaerial and submarine volcanoes release less than a percent of the carbon dioxide released currently by human activities. [https://www.usgs.gov/programs/VHP] ```

Even if it were true that humans contribute less to global warming than scientists think, we should still try to decrease our overall CO2 output because it's still a contributor to climate change, albeit a smaller one, and the majority of processes that lead to us putting CO2 in the atmosphere are unhealthy in other ways. In the US 50% of greenhouse gas emissions are attributed to transportation and energy production. I think we'd all agree that burning fossil fuels is not great for our collective health and car/airplane exhaust fumes are full of stuff we don't want to breath.