The world is full of unsolved problems. It is also full of problems for which solutions already exist, if we only leverage them. When we slow down for a minute, consider the available options, and more carefully assess the consequences of various modes of action, we have a better chance of directing our efforts where they ought to go–for the good of ourselves and the issues we face.
Ultimately Denis envisions entire green cities that function like ecosystems, exchanging materials and energy throughout the system in a self-sufficient way. Already there are experiments with sustainable buildings on a larger scale, such as the ecodistricts targeted for Washington DC and Los Angeles.