If your choices are limited to bottled or canned beer, your instinct might be to choose a bottle. They can be washed and reused, so they seem to be the greener choice, right? Not so fast. This is a subject of some debate.

“Generally speaking, every time you drink a can of beer and you recycle it, some part of that can will be back up in a shop within the next 60 days,” Kim Moratta, MillerCoors’ director of social sustainability, told OPB.org. “The other part that’s interesting is that if you make a can out of recycled content, it requires 95 percent less energy.”

Fans of the bottle, however, say that if you consider a container’s entire life cycle and the manner in which it is made, bottles clearly win. In part, this is because most of the bauxite required to manufacture aluminum cans comes from environmentally damaging mining operations in Jamaica, Guinea and Australia.

“Recycling 100 beer bottles requires more energy than recycling 100 aluminum cans, but making the aluminum cans requires a lot more energy,” David Allaway, a solid waste policy analyst at Oregon Department of Environmental Quality, told OPB.org.

No clear winner here, then, which is why drinking locally produced beer winds up a greener choice than either bottles or cans.

Think Globally, Drink Locally

If your goal is reducing the carbon footprint of the beer you drink, choose locally brewed beverages. Many craft brewers now source their hops and grain locally, reducing the pollution that inevitably results from shipping beer ingredients across the country or around the globe.

Look for craft brewers who go the extra mile to respect the environment in ways like these:

• Using heat from the brewing process to heat office space and other structures
• Using spent grain as a co-fuel for beer production, which can reduce energy consumption by as much as 70 percent a year
• Using organically grown ingredients
• Using wastewater creatively, infusing it with microorganisms that turn it into gaseous fuels like methane or hydrogen
• Using water efficiently, such as harvesting rainwater and minimizing evaporation
• Preventing spent sediment, yeast, proteins and grains from ending up in landfills by sending them to special processing facilities instead
• Using wind or solar energy to power production

Now that you have the facts, get out there and enjoy a few eco-friendly beers. Remember to drink responsibly, designate a driver and minimize your impact on Mother Nature.