This article considers the challenges posed by the need to resolve environmental claims in Investor-State dispute settlement mechanisms. After a summary of the historical background, it analyses the treaties themselves to drive home the point that many clauses in these treaties need to be better drafted and a conscious effort from States is
required in this regard. It then turns to an analysis of the jurisprudence of environmental claims and the reaction
to the awards given by the tribunals, especially the International Centre for Settlement of Investment Disputes
(ICSID)