The planet's biggest problems have to do with sustainability, environmental decline, global poverty, disease, conflict and so forth. Really, they're all interconnected - it's one big problem, which is that the way we're doing things can't go on.

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

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

Carbon zero simply means that the emissions you are releasing either are zero or balance out to zero.

Clean air and water, a diversity of animal and plant species, soil and mineral resources, and predictable weather are annuities that will pay dividends for as long as the human race survives – and may even extend our stay on Earth.

By looking at climate change as a clean energy generation problem, we're setting ourselves up not to solve it.

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.