The jury's out on the cause-effect relationship. We see a correlation
-- that does not necessarily imply causation, and the IPCC waffles on
this point as well.

the jury is unlikely to be in until its too late to alter results

as usual a decision must be made on incomplete information
so instead of preceding in certainity we precede on estimated risks

one estimated risks is the water supply of the western united states
depends on mountain snow packs persisting into summer
(yes we really do have snow in the mountains into june and even july)

global warming will likely melt the snow early
invalidating the assumptions underlying water management
so that the western united states will likely need
a completely overhaul of the entire system and water allocation
which will be very expensive
perhaps bringing economic ruin to farmers and fishers
which will be very expensive

given the expected costs of doing nothing
what is the cost of doing something and preventing this?

arf meow arf - i dont like squishy
i think i hit a wookie on the expressway
nobody could do that much decoupage
without calling on the powers of darkness