Let G be a reductive group and let ·G be its Langlands dual. We give an interpretation of the dynamical Weyl group of ·G de¯ned in  in terms of the geometry of the a±ne Grassmannian Gr of G. In this interpretation the dynamical parameters of  correspond to equivariant parameters with respect to certain natural torus acting on Gr. We also present a conjectural generalization of our results to the case of a±ne Kac-Moody groups.
The article focuses on the influence of global climate change on the world economy. The author points out that this influence is broader than damage from the transformation of environment caused by climate change and involves the variety of issues including impacts on the technological progress and formation of new carbon markets. Special attention is paid to the role of intergovernmental regulation and the composition of climate policy which change as the influence of climate change grows. Climate policy passes to the national level and switches to the priority of adaptation measures.