doesn’t it cause more air drag on the vehicles ? I’m guessing it might be very small but multiplying that by thousands of cars everyday doesn’t it indirectly produce more greenhouse gases than it helps saving ?[highway vertical wind turbine](https://youtu.be/LZrzJXas61E)
In: Engineering
It doesn’t cause more drag on the car. You are merely recovering the energy the car wasted on moving air due to parasitic drag.
In an ideal world, however, we would build cars that are so aerodynamic that drag become negligible, rather than trying to recover energy from the air a car moves. Because there’s a lot of losses and costs involved with recovering energy, so it’s better to not waste it in the first place.
In some cases it’s inevitable to waste energy tho, and a lot easier to recover it. For instance, the waste heat of a power plant. We should focus on this.
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