Cyanobacteria, and their toxins, are incredibly diverse. How can risk be measured?

When a greenish cloud, surface scum or other suspicious algae appears in a previously clear lake, the message is clear: Stay away. As cyanobacteria blooms become more common in New Hampshire, that precaution has become common practice across the state. The reason? Cyanobacteria, an ancient single-celled organism that multiplies to excess when nutrients and heat […]