To follow up on my post about the city being a safer place for people to live than suburbia, I submit that urban dwellers are safer for the planet than suburbanites.
There are a lot of holes in our research regarding climate change and the impact of various human activities. Should the carbon produced in producing a microwave in China and transporting it to the United States be assessed to China or the U.S.? Is a train full of strawberries from California more efficient than the truck full at Soulard Market? A lot is left to be better understood, but some things are clear, urbanites consume less gasoline, less water and less energy for heating and cooling.