The increasing acidity of our oceans caused by increased atmospheric CO2, is likely to be instrumental in "protecting against future ice ages" (http://plankt.oxfordjournals.org/cgi/content/abstract/30/2/141?ct). Thank fuck for that! Further reading: http://www.royalsoc.ac.uk/displaypagedoc.asp?id=13314 http://www.ipsl.jussieu.fr/~jomce/acidification/paper/Orr_OnlineNature04095.pdf http://pangea.stanford.edu/research...Science_Anthropogenic Carbon and ocean pH.pdf http://en.wikipedia.org/wiki/Ocean_acidification