I think there's a gigantic generation gap in terms of how people understand the Internet and how much they think technology is an important factor in social change.

We get so little news about the developing world that we often forget that there are literally millions of people out there struggling to change things to be fairer, freer, more democratic, less corrupt.

For most people, using the Internet broadens their sense of who 'we' is and actually ends up leaving us in a place of greater compassion and understanding. It leaves us more connected to a larger group of people and more at one with a lot more people in our community.

I think there's a gigantic generation gap in terms of how people understand the Internet and how much they think technology is an important factor in social change.

By fundamentally changing how we design the places and systems that enable our daily lives, we can slash emissions way beyond the immediate carbon savings - because our own personal emissions are just the tip of a vast iceberg of energy and resources consumed far from our view.

Urban retrofitting: creating different sorts of spaces and uses out of places that are already there.

There is no such thing as garbage, just useful stuff in the wrong place.