Think of lunch trays at a school cafeteria, the container you get your Chinese food takeout in, your local coffee shop’s disposable foam cups. Also think of single use dinnerware such as plates that are not made out of paper. These disposable plates are most likely made out of polystyrene foam.
Researchers at the Massachusetts Institute of Technology (MIT) set out to answer that question, analyzing a year’s worth of New York taxi trips. They concluded that the total amount of time that taxis spent traveling could have been reduced 32 percent by shared cabs, with passengers riding no more than an extra five minutes.