A comment as promised:-) The contrast of the tree silhouette is bold and strong but a little dark as that I think it would have been a bonus to see some texture details. I like the POV where the tree rises above us much like the tall skyscrapers seen in the backdrop. I like your side by side comparision of man and nature's works for it makes me think and reflect on how both can make the individual feel small. One other critique I have is that I think the composition could be stronger if you composed the shot on a vertical frame that way it would follow and complement the lines of both the tree and the buildings rising above us.
Darn - meant to comment. I liked the strong contrast of the tree silhouette. And then it looks like the buildings are evolving from the tree. Pretty cool!