Life Aquatic: Nanotech is Saving Volcanic Lake from Algae Explosions

New Zealand’s Lake Rotorua is a peaceful place with a violent past. It came into being some 200,000 years ago when a massive volcano blew up, collapsed and rain water filled its 10-mile wide caldera.
Today, Rotorua’s pellucid aquamarine water is a huge tourist magnet. But as the area developed, effluent from farms and nearby towns also fueled algae blooms that gobbled up oxygen and threatened to suffocate fish and other aquatic life in the lake.