Did your heart skip a beat when you read the news that a researcher had turned a byproduct of biodiesel into fish that make people healthier? It seems to have been picked up all over the place. In essence, making biodiesel results in large quantities of crude glycerol, which needs expensive purification before you can added it to white wine or anti-freeze. However, microalgae can use the glycerol as a feedstock and make omega-3 fatty acids from it. And fish can eat the microalgae, retaining the omega-3s. And people can eat the fish and gain the benefits.
At last, a good reason to support biodiesel!
Well, Gary Jones took the whole fuss apart in great style.