@Npars01@Ruth_Mottram Yes, methane clathrates have been feared for many years. It's probably best not to think about it.
Climate scientists talk about tipping points because there are positive feedback mechanisms that we will trigger if we go beyond certain temperature points. Exactly where those points are is unknown because the problem is too complex for us to analyze completely today. But we know they're there. Clathrates is one of them.
What happens when clathrates at the bottom of the sea decompose? Will we reach that point?