Okay then, back to the park problem of vertically developed cities and urban environments.

Having trees which line roadways has been a typical solution to this problem, but with the levels of the problem increasing now and into the future, will this continue to be a viable solution. If we fast forward 50 years, we may see cities like New York and London with wide areas of the cities with buildings which are constructed to heights seen only very rarely today. These buildings will obviously obstruct a large portion of the sunlight from reaching the pathways on the ground level. There are two solutions to this problem: we could construct building which reflect light downward to the ground, or we could use energy to artificially provide much needed sunlight. Even when you do this, I think most people would agree that only having trees on roads would not be enough for an entire city. People have considered the possibility of perhaps dedicating entire floors of skyscrapers into parks, so that its residents can enjoy it.