What will it take for any city to become 100% renewable, and what challenges will they need to overcome to achieve this goal?

Progress in China, the US and elsewhere shows an increasingly positive solar future

Concrete in the built environment reabsorbs atmospheric carbon

What exactly makes a city sustainable and how can cities find success in improving how they relate to the environment?

Despite major renewables growth last year, CO2 emissions reached a historic high

Why does our infrastructure have such difficulty with sustainability?