James Hamblin, writing for The Atlantic:
In 2010, journalist and caffeine aficionado Murray Carpenter visited the Keurig facilities in Waterbury, Vermont, reporting for The New York Times that the K-Cup idea posed environmental concerns, as the pods were not recyclable or biodegradable. It was that same year that the Keurig model seemed to take off, doubling in sales. In a 2011 local-boys-make-it-big story in the Boston Globe magazine, Eric Anderson, a professor of marketing at Northwestern University, likewise noted that the coffee machines could invite significant backlash because they “generate a ton of plastic waste.”
At the time of Carpenter’s visit, Keurig was on pace to sell three million K-Cups. So to say that growth has been good since then is understatement; last year they topped 9 billion. But today the cups are still not recyclable or biodegradable.
Unfortunately, convenience and waste tend to be positively correlated. Disposable diapers, plastic water bottles, and increasingly single-serving beverages.