Bike, Car or Train: Which Commute Has the Worst Air Pollution?

The traffic in the Bay Area regularly ranks among the nation’s worst — and sitting in traffic isn’t just irritating; there’s some downright unhealthy stuff in that air you’re breathing.

Breathing in air pollution can irritate the lungs and aggravate both asthma and cardiovascular disease. However, a recent study from the California Air Resources Board shows that how you get to work makes a big difference.

Commuters participating in the study wore backpacks crammed with instruments to measure soot from diesel engines and other pollution while they biked, drove, bused or rode the train to work in Sacramento.

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