[d--]

Haven't tested this, and it's a true concern. But I would hope there's some truth to emission reductions as having a comprehensive pass (includes bikes, buses, and Helsinkis good subway system) should entice people to use these options as well. One incentive to use these other options is not needing to search for a parking spot. To make a real difference, people need to be willing to not rely on car sharing 100%, though. So maybe more incentives would be needed for this to reduce emissions in other cities.