With an Icelandic volcano threatening to erupt at any moment, some social media users are falsely claiming that fumes from the natural disaster will produce more CO2 than all the cars and planes on the planet. Volcanoes are indeed capable of spewing huge clouds of ash and toxic fumes, but that's nothing compared to human-caused greenhouse gas emissions. According to peer-reviewed study According to a 2019 report by the Deep Carbon Observatory in Washington, DC, human activity emits approximately 40 to 100 times more CO2 each year than all the volcanoes on our planet. But do volcanoes still have an impact on global emissions? Yes, volcanic activity that lasts for several days, such as the 2010 volcanic eruption in Iceland that shut down air travel in Europe for almost a month, can temporarily affect the climate. Volcanic gases such as sulfur dioxide can cause global cooling, while volcanic carbon dioxide, a greenhouse gas, can cause global warming. According to IPCC however, it does not have as significant a long-term impact as emissions caused by human activity. (Sophia Khatsenkova)