(San Francisco – Casey Miner, KALW News) If you use public transportation to get around the Bay Area, the Clipper card can seem like a pretty great thing: load it up with money and it will keep track of how much you've spent on any of the Bay's many transit agencies. You still might have to take three kinds of transit to get to work, but instead of hunting around in your pockets for change or riffling through all your receipts to find a transfer, you just tag your card and go. It’s supposed to simplify things, and for a lot of people it has. Eventually, transportation officials want the Clipper to be the main way that regular riders pay their fares. That means no more paper passes. You might not think that’s such a big deal – why waste the trees? But it’s not so easy for everyone to get around without them. Hear why over at KALW News.