Here in the US, tea is essentially a niche product, falling way behind coffee in terms of popularity. But in places like the Middle East, Europe, and Asia, tea far surpasses coffee as a national past time. In 2008 alone, the world production of black tea was more than 3.8 million tons.
Typically, all those spent tea leaves and remaining liquid are tossed out with the trash, but now two Pakistani researchers have decided to tackle what they perceived as a waste of resources, and have figured out how to completely recycle the leftover tea and tea leaves into biodiesel, ethanol, methane, propane, fertilizer and even chemical spill absorbent.
Pretty ingenious if you ask me.