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    Water quality inspector taking sample of water at suspected pollution site — Stock Photo
    Water quality inspector taking sample of water at suspected pollution site
    Pollution control inspector in protective suit taking sample of toxic substance leaking from oil drum. — Stock Photo
    Pollution control inspector in protective suit taking sample of toxic substance leaking from oil drum.
    Water quality inspector filling sample container with river water at pollution site. — Stock Photo
    Water quality inspector filling sample container with river water at pollution site.
    Pollution control inspector approaching barrel with hazardous waste. — Stock Photo
    Pollution control inspector approaching barrel with hazardous waste.
    High angle view of man in waders working at water tanks at fish farm. — Stock Photo
    High angle view of man in waders working at water tanks at fish farm.
    Empty plastic crumpled bottles waste lying in clear water on seaside near rocks — Stock Photo
    Empty plastic crumpled bottles waste lying in clear water on seaside near rocks
    Spinning brain coral in ocean water — Stock Photo
    Spinning brain coral in ocean water
    African elephant in green t-shirt standing on the ground. — Stock Photo
    African elephant in green t-shirt standing on the ground.
    Amazing landscape with scenic Yangzhuoyong Lake, Tibet — Stock Photo
    Amazing landscape with scenic Yangzhuoyong Lake, Tibet
    Lake shore with tree reflections — Stock Photo
    Lake shore with tree reflections
    Ostrich chicks, Struthio camelus australis, drinking water from a waterhole — Stock Photo
    Ostrich chicks, Struthio camelus australis, drinking water from a waterhole
    Close-up view of green water plant leaf and goldfish in pond — Stock Photo
    Close-up view of green water plant leaf and goldfish in pond
    A herd of water buffalo, Bubalus bubalis in long grass on marshland — Stock Photo
    A herd of water buffalo, Bubalus bubalis in long grass on marshland
    A leopard, Panthera pardus, bending down to drink — Stock Photo
    A leopard, Panthera pardus, bending down to drink
    Rural landscape at sunset, Yosemite National Park, California, USA — Stock Photo
    Rural landscape at sunset, Yosemite National Park, California, USA
    A white rhino and calf, Ceratotherium simum, drinking at a waterhole — Stock Photo
    A white rhino and calf, Ceratotherium simum, drinking at a waterhole
    A herd of of elephants, Loxodonta africana, drinking together from a river, black and white. — Stock Photo
    A herd of of elephants, Loxodonta africana, drinking together from a river, black and white.
    Businessman holding glass of water outdoors — Stock Photo
    Businessman holding glass of water outdoors
    Lei Triggerfish (Sufflamen bursa) photographed while scuba diving along the Kona Coast; Island of Hawaii, Hawaii, United States of America — Stock Photo
    Lei Triggerfish (Sufflamen bursa) photographed while scuba diving along the Kona Coast; Island of Hawaii, Hawaii, United States of America
    Pollution control inspector taking sample at pollution site. — Stock Photo
    Pollution control inspector taking sample at pollution site.
    Smiling environmentalist volunteers planting new tree — Stock Photo
    Smiling environmentalist volunteers planting new tree
    An elephant, Loxodonta africana, drinking at a waterhole surrounded by greenery — Stock Photo
    An elephant, Loxodonta africana, drinking at a waterhole surrounded by greenery
    Close-up view of tea set served on glass surface at pond with goldfish — Stock Photo
    Close-up view of tea set served on glass surface at pond with goldfish
    Elephant lifting trunk to mouth to drinking water in Africa. — Stock Photo
    Elephant lifting trunk to mouth to drinking water in Africa.
    High angle close up of baby crocodile, Chobe National Park, Botswana. — Stock Photo
    High angle close up of baby crocodile, Chobe National Park, Botswana.
    Mekong river and brine well at Tibet mangkang county — Stock Photo
    Mekong river and brine well at Tibet mangkang county
    Empty plastic crumpled bottles waste lying in clear water on seaside near rocks — Stock Photo
    Empty plastic crumpled bottles waste lying in clear water on seaside near rocks
    Seal laying on the rocky shore at the water's edge; Antarctica — Stock Photo
    Seal laying on the rocky shore at the water's edge; Antarctica
    Close-up view of fresh green Lotus leaf texture — Stock Photo
    Close-up view of fresh green Lotus leaf texture
    Seals on the beach, Highlands, Scotland, UK — Stock Photo
    Seals on the beach, Highlands, Scotland, UK
    A newborn Humpback Whale ( Megaptera novaeangliae ) breaches; Maui, Hawaii, United States of America — Stock Photo
    A newborn Humpback Whale ( Megaptera novaeangliae ) breaches; Maui, Hawaii, United States of America
    Beautiful landscape with mountains and Chinese Lijiaxia reservoir in Qinghai Province — Stock Photo
    Beautiful landscape with mountains and Chinese Lijiaxia reservoir in Qinghai Province
    Inverted image of remote alpine lake, along the Pacific Crest Trail — Stock Photo
    Inverted image of remote alpine lake, along the Pacific Crest Trail
    Lake shore with tree reflections — Stock Photo
    Lake shore with tree reflections
    North America view of Earth globe, detailed and photorealistic 3d illustration. — Stock Photo
    North America view of Earth globe, detailed and photorealistic 3d illustration.
    Dead tree trunks in lake — Stock Photo
    Dead tree trunks in lake
    Herd of buffaloes lying in mud wallow in Africa — Stock Photo
    Herd of buffaloes lying in mud wallow in Africa
    A leopard, Panthera pardus, walking passed a waterhole, reflection in water — Stock Photo
    A leopard, Panthera pardus, walking passed a waterhole, reflection in water
    Three elephants walking in a line across river in rear view, Africa. — Stock Photo
    Three elephants walking in a line across river in rear view, Africa.
    Man in waders standing in river water, holding large fish net. — Stock Photo
    Man in waders standing in river water, holding large fish net.
    North Saskatchewan River in winter with Mount Peskett in Kootenay Plain, Alberta, Canada — Stock Photo
    North Saskatchewan River in winter with Mount Peskett in Kootenay Plain, Alberta, Canada
    Hippo, Hippopotamus amphibius, in waterhole, yawning and showing its teeth. — Stock Photo
    Hippo, Hippopotamus amphibius, in waterhole, yawning and showing its teeth.
    Pride of lions, Panthera leo, drinking at a waterhole simultaneously, reflections in the water — Stock Photo
    Pride of lions, Panthera leo, drinking at a waterhole simultaneously, reflections in the water
    Scenic view of Mt Roland at sunrise, Tasmania, Australia — Stock Photo
    Scenic view of Mt Roland at sunrise, Tasmania, Australia
    Moon setting over Schooner Cove, Pacific Rim National Park, Vancouver Island, British Columbia, Canada — Stock Photo
    Moon setting over Schooner Cove, Pacific Rim National Park, Vancouver Island, British Columbia, Canada
    Asiatic area of Earth globe, detailed and photorealistic 3d illustration. — Stock Photo
    Asiatic area of Earth globe, detailed and photorealistic 3d illustration.
    Little Elbow Provincial Recreation area — Stock Photo
    Little Elbow Provincial Recreation area
    Empty plastic crumpled bottle in water — Stock Photo
    Empty plastic crumpled bottle in water
    Plastic bottles at recycling center — Stock Photo
    Plastic bottles at recycling center
    Close-up view of fresh green Lotus leaf texture — Stock Photo
    Close-up view of fresh green Lotus leaf texture
    Iceberg in a calm lake with beautiful view, Iceland — Stock Photo
    Iceberg in a calm lake with beautiful view, Iceland
    A hippo, Hippopotamus amphibius, yawning in a green waterhole — Stock Photo
    A hippo, Hippopotamus amphibius, yawning in a green waterhole
    Spinning brain coral in ocean water — Stock Photo
    Spinning brain coral in ocean water
    Diverse group of women walking along beach, picking up rubbish. eco conservation volunteers, beach clean-up. — Stock Photo
    Diverse group of women walking along beach, picking up rubbish. eco conservation volunteers, beach clean-up.
    Herd of elephants gathering at water hole, Moremi Game Reserve, Botswana — Stock Photo
    Herd of elephants gathering at water hole, Moremi Game Reserve, Botswana
    African Bush Elephants ( Loxodonta africana ) standing by water; Ethiopia — Stock Photo
    African Bush Elephants ( Loxodonta africana ) standing by water; Ethiopia
    African jacana bird stepping over hippos wallowing in water in Africa. — Stock Photo
    African jacana bird stepping over hippos wallowing in water in Africa.
    Flamingos in lake Chitu, Abiata-Shala National Park, Ethiopia — Stock Photo
    Flamingos in lake Chitu, Abiata-Shala National Park, Ethiopia
    Europe with clouds view of Earth globe, detailed and photorealistic 3d illustration on white background. — Stock Photo
    Europe with clouds view of Earth globe, detailed and photorealistic 3d illustration on white background.
    White swans of Rongcheng, Shandong Province, China — Stock Photo
    White swans of Rongcheng, Shandong Province, China