For the life of me I can't figure out why so many "environmentally-conscious" persons think that wireless charging is great.
The losses are huge compared to just plugging in. Heat is a byproduct of power losses - and lots of heat = lots of loss.
But in general/average - wireless charging is only 40-70% efficient compared to cable charging. And that is based on "perfect" placement on the charge mat. So you throw lots of perfectly good electricity out the window.
So wireless charging is no different to heating your house in the winter - with the windows open.