The advice is often impractical. For instance， I should walk， bike， or take the busto work. Sounds great in a perfect world， but my job requires trips to a city 70 milesaway， a compromise for my two-career family. I'd drive a hybrid car， but they'restill a bit pricey for the likes of young professionals such as me. I'd ride light-rail，if they'd build it， and if cities offered reliable public transportation， I'd be there.