Rio+20 and Its Shades of Grey

Sustainable development always seems to come in shades of grey; excuses, obfuscation, conflicting demands, entrenched interests, and inertia can overshadow clarity on what needs to be done ‘on Monday morning’. But for some reason, like Rio de Janeiro’s iconic black slate and white marble sidewalks, sustainable development seemed to be a lot more black and white at last week’s big UN Conference on Sustainable Development.

Maybe it was the more than 20 hours that I spent stuck in traffic that helped bring clarity; or being one of the 50,000 visitors, each spending an average of $10,000 to travel, and emitting about 3.5 tonnes of CO2e (coincidentally what the global average annual per capita emissions needs to stay below, if we want to remain within a warming of 2° C). Flight delays getting there and back were more than 50 hours; leave alone the 24 hours in-the-plane. Was the Rio journey worth it?

What a waste in a changing climate

Let’s talk trash, just for a few minutes. In the time it takes you to read this pithy blog, more than 14,000 tonnes of waste will be generated: that’s enough to fill the Pentagon in less than a day. More than 1.5 billion tonnes of trash will be generated this year alone. And if you’re inclined to read this blog again in 2025, the amount will have increased to 23,000 tonnes. The annual trash generated at that time will be more than 2.2 billion tonnes a year. That’s enough garbage to fill the Roman Coliseum 730 times, or a line of garbage trucks 900,000 km long, 23 times around the world. Last week’s release of What a Waste: A Global Review of Solid Waste Management summarizes the issue.

Our cities generate enormous amounts of waste, and they’re just getting started – volumes will likely to increase beyond 2100, and we should plan for about a peak volume, four times what we have today. In today’s dollars, annual waste management costs will eventually exceed $1 trillion, and this cost is almost entirely borne by cities (this amount, for example, eclipses any sort of financial contributions to deal with climate change now being discussed within UNFCCC negotiations). Clearly we have a problem. But why is this particularly relevant to the climate change community?

Mining the City: A Proposal to Move the World

Cities are already a major source of raw materials, recycling more than 400 million tonnes a year of paper and metal from their urban ore. In some particularly good countries more than 90 percent of their discarded aluminum cans are ‘mined’ and recycled into new aluminum. In a few cities, old landfills have even been mined to recover past discarded metals. Another link between cities and the mining industry might be replicating contests held by two important mining companies.

The Seven Habits of Highly Effective Cities

1. Be Proactive. There’s much any city can do today. Even without sufficient budget or authorization from ‘senior levels’ of government, every city has a full menu of things that can be carried out immediately, generating positive momentum and goodwill. Business rewards the active entrepreneur, and the public desperately wants active cities. The rewards are great.