A page on possible effects of global warming that spends a large percentage of its time discussing vineyards will be amusing to many Americans, who enjoy making fun of 'chardonnay-drinking liberals'.

(Indeed, in the US knowing the name of any specific varietal may brand you as suspiciously effete and elitist: 'chardonnay' is chosen for this phrase simply because it's a variety of white wine that's commonly drunk at parties and receptions - and most people couldn't even pronounce 'sauvignon-blanc drinking liberal'.)