Design does matter. And not necessarily in a way that people realize. A lot of what you do, people take for granted - that a park has always been here, that a bicycle lane has always been there, that the street is safe or clean.

To a contrarian like me, constant advice not to do something almost always starts me quickly down the risky, unpopular path.

Whatever you may think of the proposed mosque and community center, lost in the heat of the debate has been a basic question: Should government attempt to deny private citizens the right to build a house of worship on private property based on their particular religion?

We all must recognize that homeland security funds should be allocated by threat and no other reason.

Fifty percent of the world's population lives in cities. In a couple of decades, 70 percent of the world's population will be living in cities. Cities are where the problem is. Cities are where the solution is, where creativity exists to address the challenges and where they have most impact. This is why, in 2005, the C40 was founded, an organization of cities that address climate change. It started with 18 cities; now it's 91. Cities simply are the key to saving the planet.

Yes, they broke the law, but we can't deport them. Let's get over this pointing fingers and do something about that, whether it - they have to pay a fine, learn to speak English, the history, you can do that. And then you have to give visas for the skills we need.

We have an energy policy - we're transferring our wealth to overseas to a bunch of countries that don't have the same values as us. In some cases, they're using our money to finance terrorism against us.