Brussels is the latest city to provide incentives for commuters willing to take transit in the name of air quality.

"Brussels has moved to make the city’s public transport and bike share system free on the smoggiest days in a bid to drive down pollution levels and meet EU air quality directives," reports Arthur Nelson.
The free public transit rides would be triggered whenever the city's air quality surpasses 51-70 micrograms of particulate matter per cubic metre of air for two consecutive days. City officials say the new air quality measures will be in place by the summer.
Brussels is the latest in a series of cities opening public transit for free rides in an attempt to curtail air pollution. Both Seoul and Salt Lake City have implemented similar programs for the same reason.
FULL STORY: Brussels to make public transport free on high air pollution days

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