Reading how people lived hundreds of years ago is fun. It reminds you that being able to drink a cold beer created in another country is a miracle.
When you think about how much effort it took to get that beer into your hands, it's funny which component draws the most scrutiny. It's not the farmland required to grow the barley, the diesel machines required to harvest it; not the aluminum mining required to create the cans; not the fume-belching ships or delivery trucks that get it to you, or the freon required to keep it frosty on the way; instead it's the little plastic thing that holds six cans together. That's the only thing where we can draw a straight line between the item and dead wildlife.