The most obvious liabilities for companies and their directors relate to physical loss or damage. The residents of Tuvalu in the Pacific and Kivalina in Alaska, whose homes are disappearing beneath rising waters, have both threatened challenges against polluters.
Follow the Tuvalu link to its source and you find a national Geographic Article entitled:
Will Pacific Island Nations Disappear as Seas Rise? Maybe Not
and which contains this:
Some islands grew by as much as 14 acres (5.6 hectares) in a single decade, and Tuvalu's main atoll, Funafuti—33 islands distributed around the rim of a large lagoon—has gained 75 acres (32 hectares) of land during the past 115 years.
I wonder if Mr Thornton wrote the article himself?