“Russian scientists have mapped out 7,000 dirt-covered mounds in Siberia, which have mysteriously taken shape in the otherwise flat tundra landscape. Some are slowly filling up with pressurised carbon dioxide and methane, with some on the verge of exploding.” https://www.theguardian.com/world/2017/may/11/finland-voices-concern-over-us-and-russian-climate-change-doubters
In a fair world, climate change deniers would be the first victims of bursting Siberian acne.
“A mystery crater spotted in the frozen Yamal peninsula in Siberia earlier this month was probably caused by methane released as permafrost thawed, researchers in Russia say. … Since the crater was reported, local reindeer herders have noted a similar but smaller hole nearby.” (http://www.nature.com/news/mysterious-siberian-crater-attributed-to-methane-1.15649)
The reindeer resent any implication that, as grazers, they could be responsible for any methane production.