There’s a green bloom of cyanobacteria on Lake Erie again. People who run water utilities and scientists are watching the bloom because the cyanobacteria can produce toxins called microcystins that are dangerous for people and pets. It's what made Toledo’s drinking water unsafe to drink in 2014. Chris Winslow directs Ohio Sea Grant and Ohio State University’s Stone Laboratory. He says the bloom’s covering about 10% of the western basin.