When I first caught a quick glimpse of this energy-producing treadmill, I really thought it was going to be huge. What a great idea--getting the exercise you need, while creating the power that you demand. Even if it's a tiny amount, why not? A few less watts being drained from the power grid. And what's cleaner than burning unwanted fat and calories to produce useable electricity.
Then I read a little further and realized that the treadmill just creates enough energy to power itself. As you exercise you'll recharge the battery via a built-in generator, which will keep the display and controls powered up. Still a bit greener than the average plug-in treadmill, but far from the product I originally envisioned. And when one realizes it costs $8500, you won't be saving any money anytime soon, either. In the end, it's about as eco-friendly as an actual jog in the outdoors--nothing lost, nothing gained in terms of power consumption.
But, for some reason, people really like treadmills and despise running outside. Given that fact, the EcoMill is an innovative green product that can save some energy, especially when used at a public gym facility where people are hitting the treadmill all day.
Source: Coolest Gadgets