Is this brown sludge the future of fuel? It used to be garbage, but now a Danish energy company wants to turn it into ethanol, and other biofuels. Find out more in our latest Technology Podcast with host Clark Boyd.
Our coverage reaches millions each week, but only a small fraction of listeners contribute to sustain our program. We still need 224 more people to donate $100 or $10/monthly to unlock our $67,000 match. Will you help us get there today?