California lake so green with algae it’s visible from space, says Nasa

Bright hue of Clear Lake, state's largest freshwater basin, may have been caused by cyanobacteria and other phytoplankton

California's largest freshwater lake has turned bright green due to algae blooms so intense they are visible from space, Nasa has announced, sharing satellite images from mid-May.

The photographs showed that bright green swirls were visible across most of the lake's area", the space agency said, and may have been caused by cyanobacteria, commonly known as blue-green algae, as well as other kinds of phytoplankton.