Copenhagen has done a remarkable job creating streets that are focused on bicycles and pedestrians.

In Copenhagen, there's a long-term commitment to creating a well-functioning pedestrian city where all forms of movement - pedestrian, bicycles, cars, public transportation - are accommodated with equal priority.

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.

There's no really rosy scenario ahead, where climate change just doesn't happen, but I believe we don't have the ethical right to throw our hands up in the air and say, 'Game over.' Whatever pathway we choose, our descendants will be dealing with that reality for centuries to come.

Saying the Tech Bloom is not commercially driven is like saying Mother Teresa had an interest in the poor.