Are the calculations available somewhere? From <a href="https://en.wikipedia.org/wiki/Human_power#Available_power" rel="nofollow">https://en.wikipedia.org/wiki/Human_power#Available_power</a> the output of 1 person is ~100W in ideal setup. If they expect to extract some energy from the movement of the stage during a not coordinated action of the dancers, I expect a much smaller number.<p>For comparison, an old lamp used ~100W, an air conditioner for a small home uses 3000W.<p>How much is "70 tonnes of carbon emissions per year" compared to the CO2 emissions? How much CO2 will they need to make and install the devices?