[flgb]

So what? We shouldn't try and collect more evidence? We should give up on the debate? This really shouldn't be about 'sides'.

By the way, as evidence of global warming, repeated snowless winters in Detroit would not be especially more convincing than the huge amount of evidence we already have.

You don't have to wait to observe the effects of climate change. Where I come from - the south-west of Western Australia - when compared to the 70s, rainfall levels are way down, stream flows into dams are way down, number of hot days per year are up, and average temperatures are up.