Each year, coffee companies like Keurig and Nespresso produce almost 50 billion single-serve coffee pods, which are notoriously difficult to recycle. Keuring even says so on its labels. Club Coffee in Canada uses a different approach, making a compostable K-Cup alternative, the PurPod100, out of coffee waste. We also asked a coffee expert: What's the most convenient way to brew with the least amount of waste? | Insider Tech