Freshwater pearls facing extinction due to pollution in UK

[ahlam1399]

There are only nine rivers in the **rth of England where the freshwater mussel survives, and two in the south of England, both in Devon.

أكثر... ( http://zeenews.india.com/environment/freshwater-pearls-facing-extinction-due-to-pollution-in-uk-1994874.html )