RealD cinemas alone served 100 million moviegoers, and even if the vast majority recycle, that's still a ton (probably several thousand tons, in fact) of plastic 3D glasses. According to a company called Ceroplast, those glasses aren't biodegradable; if so many as 10 million pairs end up in a landfill, it would result in C02 emissions equivalent to burning 50,000 gallons of gasoline. Of course, Ceroplast wouldn't be quoting statistics if it didn't have a greener solution. Under the brand of partner Oculus3D (whose co-founder Lenny Lipton is RealD's former CTO), it's presently making biodegradable polarized shades out of polylactic acid that it intends to deploy -- along with the company's proprietary OculR projectors -- as early as summer of this year. As for which theatres you should expect to see them in, well, we're still in the dark on that one.