When you reach for that candy bar this Halloween, don’t just count calories—count kilowatt-hours. Big candy manufacturers use a lot of energy to feed our sugar addiction, especially this time of year. The average American consumes about 22 pounds of candy per year, which is the weight of roughly 2,200 Hershey’s kisses.

That’s a lot of candy. “[We’re] good at making chocolate…but we’re not an expert in producing power,” says Winston Chen, the renewable energy manager for Mars Incorporated.

Thanks to energy efficiency, Mars soon won’t need to use as much power. As concerns about energy consumption, water depletion, and climate change rise, your favorite candy companies are taking energy-saving steps to improve their business models and meet their sustainability goals.

(Read more) American Council for an Energy-Efficient Economy