Welcome to FTW Explains, a guide to catching up on stuff going on in the world. At the Rio Olympics this week, the diving pool turned noticeably green as competition continued. Here’s what you need to know.
Why is the water turning green?
A Rio spokesman told the media the color change was caused “by a proliferation of algae,” though organizers said an investigation was ongoing. Algae, if that’s the cause, has chlorophyll in it, which gives the water a greenish hue.
Why would there be algae in the diving pool?
“It could be a number of sources,” Dr.