About Paul A. Eisenstein
Paul A. Eisenstein is a contributor for CNBC
More From Paul A. Eisenstein
Travel Tips
Hitting the Road This Summer? How to Save on Gas.
Before you finally take that much-needed vacation, make sure your car is operating at optimal efficiency.
Technology
No Cars Allowed: Big Cities Look to Curb Vehicles for Good
Urban centers around the world, from Hamburg to Shanghai, are looking to cut down on pollution by reducing the number of cars on the road.