Iranian sewage adds to Caspian Sea pollution

Help

The Caspian Sea, surrounded by Kazakhstan, Azerbaijan, Turkmenistan, Russia and Iran, has long suffered pollution from oil extraction and other industries.

But a more recent concern is bacterial pollution caused by sewage from Iran, which is adding to the threats facing sturgeon fish and the caviar they produce.

Karen Zarindast reports.

Copyright © 2018 BBC. The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.