CNN: Three years ago many would have dismissed the notion that a significant supply of the world’s automotive fuel could come from algae. But today the idea, while still an adventurous one, is getting much harder to ignore. Making green from green: Biofuel from algae has been given a boost in investment in recent years. Back then there were only a handful of companies seriously focused on producing algae fuel. Now there are well over 50, according to Samhitha Udupa, a research …