New research suggests that rising temperatures in Canada's Mackenzie River Basin are triggering a climate feedback loop, accelerating the weathering of rocks and releasing more carbon dioxide into the atmosphere. The process, known as sulfide weathering, is releasing sulfate and CO2 as pyrite rocks react with oxygen and other minerals. This accelerated weathering could lead to a 45% increase in sulfide weathering between 1960 and 2020, equivalent to half the current annual emissions from Canada's aviation industry.

Source: https://www.livescience.com/planet-earth/climate-change/fools-gold-is-driving-a-new-accelerating-climate-feedback-loop-in-canada