Much of the same could be written about Oslo. Just this summer the city opened up a pretty big man made beach&#x2F;bath in the middle of the harbor: 
<a href="http:&#x2F;&#x2F;www.sorenga.no&#x2F;beliggenhet&#x2F;om-sorenga&#x2F;sjobadet&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.sorenga.no&#x2F;beliggenhet&#x2F;om-sorenga&#x2F;sjobadet&#x2F;</a><p>How they cleaned it up is actually pretty interesting. Obviously they stopped dumping waste in it in the first place. After that they placed a lot of ropes and concrete structures all over the ocean floor, to give starfish and other ocean creatures habitats. Those creatures did most of the cleaning, humans just facilitated it.<p>Here&#x27;s an article in Norwegian about it:
<a href="http:&#x2F;&#x2F;www.aftenposten.no&#x2F;viten&#x2F;Fjernet-kloakklukten-fra-Oslofjorden-med-tjukke-tau-og-sjostjerner-8184545.html" rel="nofollow">http:&#x2F;&#x2F;www.aftenposten.no&#x2F;viten&#x2F;Fjernet-kloakklukten-fra-Osl...</a>