Architect's responsibility in the 21st Century

Just read a nice article on Renzo Piano's new California Academy (he was the one who co-designed Pompidou Center in Paris with Richard Rogers).

My favourite part of the article was Piano's view of archhitect's responsibility in our contemporary world. His view is that "19th century was about new kinds of construction...Steel and so forth. And the 20th century created a language for that. Now architects must develop an aesthetic for our discovery about the fragility of nature."

I have always wondered whether there will be a coherent movement around the globe that would lead all architects to design buildings that reflect the concerns of our time.

I have a childish dream, a dream of the co-existence of nature and city. As taller and bolder skyscrapers are built, the community living or working in the skyscraper will take turns in helping in farming at the grounds (or different floors) which would create a sufficient amount of produce to sustain those living within.

I don't see how people can be harmful to their land if they cultivated their own.