Uncertainty and anxiety are ubiquitous nowadays. The global economy remains fragile, and even where it does show some life, the continued volatility (and upward trajectory) of energy and other commodity prices is there to beat back any real sense of momentum.

Meanwhile, progress on grand challenges like climate change, food and water security, and sustainable consumption is either halting or nonexistent, and there is declining confidence that large institutions, including governments, multilateral organizations, companies and even large NGOs, will lead the way in addressing them.

That’s the general feeling at the global level, and across many countries. But look through the prism of cities…

This year marks two especially significant milestones in sustainable development: the 20th anniversary of the United Nations’ Earth Summit in Rio de Janeiro and the 25th anniversary of the Brundtland Report, Our Common Future.

How far have we come since the concept of sustainable development was elevated to the global policy agenda?

To put it simply,…

Let me start by stating the obvious: The current trajectory of our society’s consumption of natural resources is not sustainable. I know it, you know it, NGOs know it, and policy makers and business leaders increasingly know it.

Yet as the world prepares for the Rio+20 Conference on Sustainable Development in June, two questions loom large:

1. Why haven’t we made substantive progress towards sustainable development over the last 20 years?

2. What do we need to do differently over the next 20 years to transition to a sustainable economy?