How many companies does it take to change a lightbulb?

Hilton and Whole Foods trade places to critique each other's energy use and offer tips in a new Department of Energy-funded reality show (yes, you read that right)

Commercial and residential buildings accounted for 41% of all energy produced in the US in 2014, with nearly half of the country's carbon emissions coming from business and industrial structures. Designing buildings to use energy efficiently - like installing lights that provide the same brightness using less energy, or insulating rooms well to reduce the need for heating and cooling - could save businesses a significant amount of money and reduce their carbon footprint.