And, hopefully, an example other cities can follow to help combat greenhouse gas emissions.

"Here’s why it matters to the rest of the world: Half of humanity now lives in cities, and the vast share of planet-warming gases come from cities. The big fixes for climate change need to come from cities too. They are both a problem and a potential source of solutions.

The experience of Copenhagen, home to 624,000 people, can show what’s possible, and what’s tough, for other urban governments on a warming planet."

And hurray for bicyclists....

"A new Metro line, scheduled to open this year, will put the vast majority of the city’s residents within 650 meters, a bit less than half a mile, of a station. Bicycle paths are already three lanes wide on busy routes for the whopping 43 percent of Copenhageners who commute to work and school by bike — even on wet, windy days, which are plentiful."