Portfolio: Energy + Waste: The Syncrude Mildred Lake mine, on the banks of the Athabasca River (upper left), Alberta, Canada 20

Tar sands mines and facilities in Alberta are among the largest industrial activities on Earth. The Syncrude Mildred Lake mine, on the banks of the Athabasca River (upper left), measures more than ten miles across.
The Syncrude Mildred Lake mine, on the banks of the Athabasca River (upper left), Alberta, Canada 20

Tar sands mines and facilities in Alberta are among the largest industrial activities on Earth. The Syncrude Mildred Lake mine, on the banks of the Athabasca River (upper left), measures more than ten miles across.