One of the most popular conservation mantras is the idea that every eco-friendly measure counts, no matter how small and insignificant it seems. NatuurcafÃ© La Port, a coffee shop in the Netherlands, proves this point with a revolutionary new revolving door that harnesses kinetic energy each time it's opened.
Traditional revolving doors are a hotel, airport and department store standby because they are far more effective at keeping out drafts in high-traffic areas than regular doors. The revolving door built by Boon Edam at NatuurcafÃ© La Port goes one step further by capturing the kinetic energy as customers enter and exit the coffee shop.
NatuurcafÃ© La Port's kinetic energy-capturing revolving door generates about 4600 kWh per year, or enough to power a U.S. household for about five months.
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