Harmful algal blooms like red tide and blue-green algae produce toxins that can be harmful to humans. This is known. What’s not known with certainty, is exactly how harmful they can be, and how far they’re able to travel through the air. Back in November a researcher from Florida Gulf Coast University, Dr. Mike Parsons , started collecting data on where the airborne toxins produced by the blue-green algae -- or cyanobacteria -- were showing up. His initial findings didn’t produce much clarity,