Wind Turbine Models

In the late 80's/early 90's concerns were being raised about global warming/climate change and one of the strategies to attempt to deal with this problem was the reduction of greenhouse gases (GHGs), especially carbon dioxide.
Western governments, primarily Europe, North America and Australia/New Zealand looked hard at fossil fuel consumption, specifically the burning of coal in power plants and moved to incentivize installation of sustainable methods of electricity generation that didn't involve burning of fossil fuels, especially coal (curiously, through a bizarre twist of logic, burning wood was not considered a problem).
Regardless, Industrial Wind Turbines and photo-voltaic solar cells were seen as the best way to generate electricity without emitting GHGs.
Initial experiments with wind turbines resulted in different designs being experimented with; the Edmonton Power Historical Foundation has on display exquisite brass models of three different styles of IWTs: a Savonius rotor, a Derrius rotor, and a Propeller type. Ultimately the propeller type has prevailed, as virtually all wind farms feature this design.
Visitors to the museum can press a button on these displays and watch as each of these turbines are spun by a small electric motor.