Too big a load... Funny, Osso!
So, the microbes that have been frozen all this time will re-activate and create methane. Are there microbes that are going to do more than that? Is there the potential for microbes we've never dealt with before that would be damaging outside of the methane such as causing illness, damaging crops, etc?
The warming / climate change is bad enough. I had just never thought about pre-historic microbes coming back to life.