One day you wash up on the beach, wet and naked. Another day you wash back out. In between, the scenery changes constantly.
Since they claim the pods don't create coffee grounds as one of the big benefits, what do you bet they didn't really do a full analysis, because I guarantee you that when they make the powder that goes in the pods, coffee grounds are created back at the factory.This just sounds like more yuppie rationalization for one of their preferred ways. Compare the time it takes for paper filters to degrade versus the plastic pods, and I doubt using the K-style pods is better for the environment.
A number of gardening magazines and books recommend adding coffee grounds (and egg shells, et al.) to garden soil as a soil conditioner and composting agent.