#HTE
A massive bloom of cyanobacteria is visible in the Baltic Sea. This Overview was featured in latest feature about cruise ships – link below to see the full story.
https://www.over-view.com/stories/cruises
This area receives roughly 300 cruise ships each year and wastewater dumped by ships contains nitrogen and phosphorous that has been proven to feed these blooms. Large blooms can cause an oxygen-depleted dead zone where other organisms cannot survive.
Source imagery: NASA - National Aeronautics and Space Administration
https://dailyoverview.tumblr.com/post/614598263747821568