It could just be a massive coincidence that at the same time that humans began throwing Greenhouses Gases into the air in vast quantities, the amount of Greenhouse Gases in the atmosphere began to climb and warmed the planet.
Instead those who didn't want to stop piling further pollutants into the air blamed everything from Sun spots to a conspiracy to introduce a World government but the latest sounds a winning way to stop the Climate Scientists shutting them down, the squirrels did it.
Apparently squirrel nutkins and his climate warming buddies are digging their burrows in Siberia and bringing oxygen to the soil and fertilising the soil with their urine and their faeces which releases greenhouse gases from the permafrost.
As i see it there are two alternatives. We can either exterminate every squirrel on the planet and carry on as before or stop paying attention to people who come out with loony stuff like this. I vote the latter.