Beer better for the environment than wine

According to an article on the Australian Broadcasting Company's website, if you are an environmentalist, you shouldn't be drinking wine. The article calculates the water usage of various products and services, with an eye on their recent drought.

Beer versus wine: with beer, water is used in the growing of barley and also in the malting and fermentation of the beer. There isn't a lot of grain in beer so 100lt ought to do it for a bottle of beer, Wayne feels. Add to that the volume in the beer itself.

Wine will use 270lt per bottle. Beer is better in terms of use and as well, a lot of grapes are grown under irrigation.

So in addition to being the drink that civilized mankind, beer is better for the environment.

Is there anything that beer can't do?