Polluting shipwrecks are the ticking time-bomb at the bottom of our oceans

[rangerrebew]

Polluting shipwrecks are the ticking time-bomb at the bottom of our oceans
Story by Fraser Sturt • 22h

© Provided by Phys.org
At the bottom of the oceans and seas lie more than 8,500 shipwrecks from two world wars. These wrecks have been estimated to contain as much as 6 billion gallons of oil, as well as munitions, toxic heavy metals and even chemical weapons.

For decades, these wrecks have largely lain out of site and out of mind. But all this time, their structures have been degrading, inexorably increasing the chances of sudden releases of toxic substances into the marine environment.
 
In parts of the globe, climate change is exacerbating this risk. Rising ocean temperatures, acidification and increasing storminess accelerate the breakdown of these wrecks.

Of course, wrecks from the world wars are far from the only ones to be found at the bottom of the sea, with many others adding to the problem. The cost of addressing this global issue has been estimated at US$340 billion (£261 billion).

https://www.msn.com/en-us/news/technology/polluting-shipwrecks-are-the-ticking-time-bomb-at-the-bottom-of-our-oceans/ar-AA1vJQS1?ocid=widgetonlockscreen&cvid=ad00f56701d8444998f0fb5ac09ce86f&ei=105

[rangerrebew]

  The cost of addressing this global issue has been estimated at US$340 billion (£261 billion).

First of all, the cost seems WAY LOW!  We still have to locate many of them and that won't be cheap.  Also, the pollution created from the salvage operations would be just as great as if they did nothing, and runs the risk of breaking fuel tanks, munitions exploding, and release of other toxins, after so many years in the water is pretty great.