Deadly Waters

S1, E1: With water pollution and temperatures on the rise, toxic algae cause serious problems nowadays for inland waters and for the oceans. Increasing algal bloom is poisoning fish and shells, and it has become a health hazard for human beings as well: toxic algae are responsible 60,000 cases of food poisoning worldwide every year. The documentary, Return of the Plagues, takes a closer look at the effect these poisonous microorganisms have today.