Washing beside the drain pumping water from the Nile to supply a crop irrigation channel around the village of Ramadi, west bank of the Nile south of Edfu, Egypt, North Africa, Africa

Children washing clothes in a drain pumping water from the Nile to supply a crop irrigation channel around the village of Ramadi, west bank of the Nile south of Edfu, Egypt, North Africa, Africa

A raised bog being harvested for peat near Douglas water in the Southern Uplands of Scotland. Raised bogs re rare threatened habitats and important carbon sinks that should not be exploited.

This badly polluted river is in the industrial city of Hangang, China, Asia

This badly polluted river is in the industrial city of Hangang, China, Asia

Black Guillemot (Cepphus grylle) pair sitting in a drain pipe that they are nesting in, one bird is calling. Black Guillemots nest in drains and holes in the sea wall in the middle of Oban town centre. Argyll Scotland, UK

Drainage ditch in peat bog on Eaglesham Moor, Scotland, United Kingdom, Europe

Black Guillemot (Cepphus grylle) standing in a wall that a pair are nesting in. Black Guillemots nest in drains and holes in the sea wall in the middle of Oban town centre. Argyll, Scotland, UK

Black Guillemot (Cepphus grylle) standing in a drain pipe that a pair are nesting in. Black Guillemots nest in drains and holes in the sea wall in the middle of Oban town centre. Argyll Scotland, UK

Black Guillemot (Cepphus grylle) pair standing in a drain pipe that they are nesting in. Black Guillemots nest in drains and holes in the sea wall in the middle of Oban town centre. Argyll, Scotland, UK

Black Guillemot (Cepphus grylle) pair sitting in a drain pipe that they are nesting in. Black Guillemots nest in drains and holes in the sea wall in the middle of Oban town centre. Argyll, Scotland, UK

Black Guillemot (Cepphus grylle) sitting in a drain pipe that a pair are nesting in. Black Guillemots nest in drains and holes in the sea wall in the middle of Oban town centre. Argyll, Scotland, UK

Black Guillemot (Cepphus grylle) calling while sitting in a wall that a pair are nesting in. Black Guillemots nest in drains and holes in the sea wall in the middle of Oban town centre. Argyll, Scotland, UK

Black Guillemot (Cepphus grylle) sitting in a drain pipe that a pair are nesting in. Black Guillemots nest in drains and holes in the sea wall in the middle of Oban town centre. Argyll, Scotland, UK

The November 2009 floods eroded the banks of the River Derwent, downstream of Cockermouth, revealing and damaging this pipeline, Cumbria, England, United Kingdom, Europe

Black Guillemot (Cepphus grylle) sitting in a wall that a pair are nesting in. Black Guillemots nest in drains and holes in the sea wall in the middle of Oban town centre. Argyll, Scotland, UK

This badly polluted river is in the industrial city of Hangang, China, Asia

This badly polluted river is in the industrial city of Hangang, China, Asia

Black Guillemot (Cepphus grylle) sitting in a drain pipe that a pair are nesting in. Black Guillemots nest in drains and holes in the sea wall in the middle of Oban town centre. Argyll, Scotland, UK

A sewer drain overcome with flood water, Ambleside, Cumbria, England, United Kingdom, Europe

This badly polluted river is in the industrial city of Hangang, China, Asia

Black Guillemot (Cepphus grylle) calling while sitting in a drain pipe that a pair are nesting in. Black Guillemots nest in drains and holes in the sea wall in the middle of Oban town centre. Argyll, Scotland, UK

This badly polluted river is in the industrial city of Hangang, China, Asia

This badly polluted river is in the industrial city of Hangang, China, Asia

This badly polluted river is in the industrial city of Hangang, China, Asia

This badly polluted river is in the industrial city of Hangang, China, Asia

Badly polluted river in the industrial city of Hangang, China, Asia

This badly polluted river is in the industrial city of Hangang, China, Asia

This badly polluted river is in the industrial city of Hangang, China, Asia

Rain running down the gutter in Jindabyne, New South Wales, Australia, Pacific

This badly polluted river is in the industrial city of Hangang, China, Asia

Detail shot of swimming pool

Manhole cover of the municipal water treatment works, old pavement, Lower Saxony, Germany, Europe

New modern bathtub, faucet and towels hanging abstract

Drain cover, Berlin, Germany

Coloured thermophilic bacteria, the outlet of Cliff Geyser, Fire Hole River, Black Sand Basin, Upper Geyser Basin, Yellowstone National Park, Wyoming, United States of America, USA

Dead trees, Mammoth Hot Springs, Yellowstone National Park, Wyoming, USA, United States of America

Emerald Pool, geyser, drainage area with a boardwalk, coloured thermophilic bacteria, microorganisms, Black Sand Basin, Upper Geyser Basin, Yellowstone National Park, Wyoming, United States of America, USA

The outflowing Lake Constance, called Lake Rhine, on the left the Hoeri peninsula with the German municipality of Oehningen, on the right the Swiss municipality of Eschenz and Mammern, Canton Thurgau, Switzerland, Europe

Drainage area of the Sapphire Pool, geyser, coloured thermophilic bacteria, microorganisms, Biscuit Basin, Upper Geyser Basin, Yellowstone National Park, Wyoming, United States of America, USA

Water flowing through a stone's drain, Pisaq, Urubamba Valley, Peru

Clay loaded with iron oxides and dried out, Rio Tinto, Andalusia, Spain *** Local Caption *** R?o Tinto ("Red River") is very acidic (Ph 2) and has a deep reddish hue due to iron dissolved in water. The acidity of the watercourse is linked to the drainage of pyrite, which is very present in the subsoil. Extremophilic and endemic bacteria and algae colonize the river bed, forming a fragile biofilm that evokes the hot springs of Yellowstone Park in the USA.