Right before risking annihilating Ancient Rome, Hannibal of Carthage
From the IPCC AR4 WG-II Chapter 12.4.3 (*), talking about the Alps
Changes in snowpack and glacial extent may also alter the likelihood of snow and ice avalanches, depending on the complex interaction of surface geometry, precipitation and temperature (Martin et al., 2001; Haeberli and Burns, 2002).
A panel has been convened to examine the above. The conclusion is that it is more likely than not that evil Exxon has helped emit greenhouse gases for the one reason of defending Ancient Rome from Hannibal.
(*) Contribution of Working Group II to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, 2007 M.L. Parry, O.F. Canziani, J.P. Palutikof, P.J. van der Linden and C.E. Hanson (eds) Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA.