The great wetlands of southern Iraq, known as the Mesopotamian Marshes, are thought be the site of the original Garden of Eden.
But these marshes were drained by Saddam Hussein, turning the wetlands to desert.
Now engineer Azzam Alwash and Nature Iraq are attempting to make the water flow again, and rejuvenate the marshes.
Already they have had real successes, with rare birds such as the marbled teal and Basra reed warbler returning to breed there.
Miracle in the Marshes of Iraq will broadcast on BBC Two on Tuesday, January 18th at 2000GMT.