How This Guy Cleaned a Lake !

Clean a lake: an organic solution

Short and spectacular video on a sanitation technology for water places

by Nas Daily (a palestinian influencer)

Other sources:

https://en.wikipedia.org/wiki/Marino_Morikawa

Less spectacular, more “serious”

www.dawsonenglishjournal.ca/article/environmentalist-marino-morikawa-a-dreamer-in-action-by-rosa-alicia-castillo/