Apart from the obvious danger of really widespread use of chemical weapons, further
regional destabilisation would be on the cards drawing Lebanon, Iraq, Jordan and possibly Israel ever deeper into a regional quagmire from which there will be no easy escape and which will be difficult to contain or roll back.
Destabilisation of the shallow - marine clathrates of ESAS continues to be excluded from every global climate model, the only (
regional - scale) model to consider this being that of Archer (2015).