"But you COULD transplant big trees"
Yes, for a price. There are very few sources of large, shade, quality trees and they are tremendously expensive to buy, install and maintain. A 30 foot tree may have a root ball of around 12 feet in diameter, a trunk diameter of 20 inches and weigh around 35000 pounds. It would also cost around $20000 and about another $40000 to get it planted properly. Thats $60000 for *one* tree. Of course that's the extreme but the only way to go if you want instant shade. There are more reasonable options, trees just over half that size could be had for less then $1000 and some species might offer some shade.
*** This post was edited by millrace on 4/20/2000. ***