Tim Fitzharris / Mount Rundle, Johnson Lake, Banff National Park, Alberta, Canada

Tim Fitzharris / Mount Rundle and Johnson Lake, Banff National Park, Alberta, Canada

Tim Fitzharris / Cascade Mountain and Johnson Lake, Banff National Park, Alberta, Canada

Ingo Arndt / Johnson River, Lake Clark National Park, Alaska

Paul Johnson / Solar powered energy station Harper Dry Lake California USA

Tim Fitzharris / Mount Rundle and boreal forest reflected in Johnson Lake, Banff National Park, Alberta, Canada

Tim Fitzharris / Mount Rundle and boreal forest reflected in Johnson Lake, Banff National Park, Alberta, Canada

Tim Fitzharris / Mount Rundle and boreal forest reflected in Johnson Lake, Banff National Park, Alberta, Canada

Paul Johnson / Harper Dry Lake with water - Area of Critical Environmental Concern, California, USA

DOMINIC JOHNSON / Oil barrels dumped in polluted lake, Siberia.

Paul Johnson / Visitor centre set on stilts in the marsh, edge of Lake Hornbarga, Sweden

Benjamin Olson / Johnson Lake and distant Lake Superior in autumn, Wolf Ridge Environmental Learning Center, Minnesota