Pond power

Driven by fluctuations in oil prices and seduced by the prospect of easing climate change, experts are intensifying efforts to squeeze fuel out of a promising new organism: pond scum. As it turns out, algae - slimy, fast-growing and full of fat - is gaining ground as a potential renewable energy source. Experts say it is intriguing for its ability to gobble up carbon dioxide, a greenhouse gas, while living happily in places that are not needed for food crops. While no one has found a way to mass produce cheap fuel from algae yet, the race is on. University labs and start-up companies across the country are getting involved.