Queensland Labor destroys 100 klms of Great Dividing Range in CQ for 401 wind towers, page-92

thanks @zipperlip - was not aware of the Nairobi information - there are over 820 cities in the world over 1 million (Nairobi has about 4.2 million) and the area of coverage of these is significant.
Your comments about the effect of substitution of crops for trees is also relevant.