Have a beer .. you'll feel better
Making beer is a energy intensive industry.
You gotta have farms that grow the hops, barley etc.
The farms need tractors that burn diesel fuel.
Ingrediants have to be transported to the brewery with trains or trucks, also burn diesel.
Once the beer is ready it needs to be transported to retail outlets, by truck or rail, still need diesel.
Here's a link I bookmarked awhile back that will really open your eyes:
http://www.freerepublic.com/focus/f-news/1476725/posts