Sitting grandly, this tree is more than 20 years old and has produced an estimated 2 crores worth Oxygen for free. Calculate the cost it would take to produce it synthetically. The shade under the tree when the foliage is thick( the pic was clicked during fall) is at least 3 degrees lesser than outside its periphery.
The truth is 800 trees versus a set of buildings/road/ human made some other structure is basically a matter of how much money can be made for our politicians from it. As for the sentiments of the people who care for trees, when did that ever make any sense to anyone.