Deadly earthquakes have struck Japan, China, New Zealand, Haiti and Chile in recent months, causing tremendous loss of life and devastating entire cities and regions. This week, I joined other urban leaders from around the world at a United Nations conference in Geneva to discuss how cities can better prepare...

Cities have sent a strong message to national governments ahead of the upcoming round of climate talks, scheduled to begin in Cancún, Mexico, at the end of this month. The message is: we are acting to address our planet's changing climate and...

Negotiators are meeting this week in Bonn, Germany, in an effort to secure a binding agreement on global climate change. However, months after the talks in Copenhagen, the prospect for an agreement this year is fading.

Fortunately cities around the world are...

As we commemorate the 40th anniversary of Earth Day, it may seem that a global commitment to reduce greenhouse gas (GHG) emissions, the major cause of climate change, is still out of our reach. But thousands of cities around the world are already putting in place innovative ideas to reduce...