re: A warmer Finland
I suggest reading IPCC on impacts rather than guessing about oranges:
http://en.wikipedia.org/wiki/IPCC_Fourth_Assessment_Report#Working_Group_II_.28WGII.29:_Impacts.2C_Adaptation_and_Vulnerability
Ocean acidification is just one more example of something that could be catastrophic and yet we know little about. But let's go ahead and roll the dice for the future, maybe we'll luck out.
