Attempts to reduce the waste being dumped into the Baltic have so far failed to stop the growth of the dead zone, now equivalent to around one and half times the size of Denmark.

CNN: Can oxygen pump breathe life into ocean 'dead zone?'

The resource estimate signalled the Revenue Zone holds a total of 3.7 million gold equivalent ounces at a grade of 1.1 grams per ton gold equivalent ounces.

FORBES: Northern Freegold To Continue Growing Freegold Mountain Project - Burges