No, you will never have skyscrapers with trees on them

When we imagine the future of environmentally sustainable cities, it's common to depict them as forests of skyscrapers with, well, forests on them. But environmental writer Tim De Chant says that architects and futurists need to get real. Skyscrapers will never support trees. Here's why. » 3/14/13 3:36pm 3/14/13 3:36pm