HopStop's Carbon Calculator Tracks The Impact Of Your Subway,
Bus Trips  In addition to knowing your exact route and even how
many calories you've burned, you can now find out the
environmental impact of every public transit trip you take--and
how much better it is than if you had taken a car.     "I don't
really look at what other people are doing to determine what we
should do, but our biggest competitors are Google Maps,
MapQuest, and Bing Maps, and I don't think they're doing this,"
explains Meyer. They're not.   "I don't think individual users
have the necessary knowledge or information to figure this out
on their own, which is why we're doing it for them," says Meyer.
[Image: Flickr user NeitherFanboy]  Reach Ariel Schwartz via
Twitter or email.  Add New Comment     • Durwin Sharp      My
guess is that even their "environmentally friendly" calculations
understate the benefits.  While the carbon footprint of one
person driving one car is a relatively straightforward (though
detailed) calculation, the in