Crayfish help Russia to monitor pollution

Scientists in St Petersburg are using crayfish and snails to monitor pollution levels.

    Scientists in St Petersburg, Russia have been using crayfish and snails to monitor pollution levels.

    The heart-rate stress of the crayfish and snails are monitored and compared to levels recorded before putting the crustaceans into potentially polluted environments.

    The crayfish are put into the river Neva while the snails breathe air from an incinerator which burns St Petersburg's sewage. These creative methods are vital to the protection of the city's four million people.

    Al Jazeera's Barnaby Phillips reports from St Petersburg.

    SOURCE: Al Jazeera


    YOU MIGHT ALSO LIKE

    Inside Korea's Doomsday Cult

    Inside Korea's Doomsday Cult

    Follow 101 East's investigation into a secretive Korean cult in Fiji as it built a business empire on exploitation.

    Racism and the black hole of gun control in the US

    Racism and the black hole of gun control in the US

    Would tighter gun laws help protect African Americans or make them more vulnerable to racism and police brutality?

    My father, a Pakistani prisoner of war in India

    My father, a Pakistani prisoner of war in India

    A daughter's tribute to the father who never recovered from his war wounds.