If you want to fix ocean pollution here is a good starting point. Excellent book on the matter by Hannah Ritchie: https://buff.ly/3xypWw8
Map Source: http://buff.ly/3qRZjfW
Source: https://twitter.com/simongerman600/status/1779124890945171495
Simon Kuestenmacher on X: Just 10 streams carry 95% of all river-borne plastic into the ocean