This article discusses the potential dangers of mercury seeping out of thawing permafrost in the Hudson Bay Lowlands in northern Ontario and Manitoba. The permafrost in this region contains an estimated 30 billion tons of carbon, which, with global warming, could release heat-trapping methane gas into the atmosphere. However, the more immediate concern is the release of mercury, which can be converted into neurotoxic methylmercury by certain microbes. This poses a risk to the Indigenous peoples who rely on the region's resources for their way of life. The article highlights the importance of involving Indigenous communities in research and management processes, as they have firsthand experience of the changing permafrost. The article also mentions the disappearing wildlife and the impact on water quality in First Nations communities due to mercury pollution.