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    Pollution control inspector taking sample of mud in field by lake. — Stock Photo
    Pollution control inspector taking sample of mud in field by lake.
    Environment worker taking sample of polluted water at pollution site. — Stock Photo
    Environment worker taking sample of polluted water at pollution site.
    Pollution control inspector taking sample of polluted water from spring in field. — Stock Photo
    Pollution control inspector taking sample of polluted water from spring in field.
    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.
    Cracked earth, Dried out land in drought — Stock Photo
    Cracked earth, Dried out land in drought
    Scenic view of Rain barrel for rainwater harvesting — Stock Photo
    Scenic view of Rain barrel for rainwater harvesting
    Reservoir dam in full spate in Wales. — Stock Photo
    Reservoir dam in full spate in Wales.
    North America and South America with clouds view of Earth globe, detailed and photorealistic 3d illustration on white background. — Stock Photo
    North America and South America with clouds view of Earth globe, detailed and photorealistic 3d illustration on white background.
    Amazing landscape with scenic Yangzhuoyong Lake, Tibet — Stock Photo
    Amazing landscape with scenic Yangzhuoyong Lake, Tibet
    A herd of elephants, Loxodonta africana, walking across a river, blue sky and greenery background. — Stock Photo
    A herd of elephants, Loxodonta africana, walking across a river, blue sky and greenery background.
    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.
    Traditional sailing boat — Stock Photo
    Traditional sailing boat
    Middle East area of Earth globe, detailed and photorealistic 3d illustration. — Stock Photo
    Middle East area of Earth globe, detailed and photorealistic 3d illustration.
    Boat mast and seagulls — Stock Photo
    Boat mast and seagulls
    Girl Playing with Paper Boat By The Sava River in Belgrade, Serbia — Stock Photo
    Girl Playing with Paper Boat By The Sava River in Belgrade, Serbia
    Bisons green grass hillside — Stock Photo
    Bisons green grass hillside
    Water buffalo ( Bubalus bubalis ) tied to a fence and for sale at the Sunday market; Bac Ha, Lao Cai, Vietnam — Stock Photo
    Water buffalo ( Bubalus bubalis ) tied to a fence and for sale at the Sunday market; Bac Ha, Lao Cai, Vietnam
    Pollution control inspector taking sample of soil at pollution site — Stock Photo
    Pollution control inspector taking sample of soil at pollution site
    Silhouette of a Jumping Kangaroo, Deep Creek Conservation Park, South Australia, Australia — Stock Photo
    Silhouette of a Jumping Kangaroo, Deep Creek Conservation Park, South Australia, Australia
    African Elephant, Loxodonta africana, wading through water — Stock Photo
    African Elephant, Loxodonta africana, wading through water
    A leopard, Panthera pardus, bending down to drink water from a waterhole — Stock Photo
    A leopard, Panthera pardus, bending down to drink water from a waterhole
    Businessman holding glass of water outdoors — Stock Photo
    Businessman holding glass of water outdoors
    The train in Alaska — Stock Photo
    The train in Alaska
    Boy watering plants in the garden on a sunny day — Stock Photo
    Boy watering plants in the garden on a sunny day
    Wooden dock to lake island reflections — Stock Photo
    Wooden dock to lake island reflections
    Diverse group of women walking along beach, picking up plastic rubbish. eco conservation volunteers, beach clean-up. — Stock Photo
    Diverse group of women walking along beach, picking up plastic rubbish. eco conservation volunteers, beach clean-up.
    Little Elbow Provincial Recreation area — Stock Photo
    Little Elbow Provincial Recreation area
    A cute dog with tongue out standing in river in the countryside, trees in the background. Ecology and beauty in nature in rural environment. — Stock Photo
    A cute dog with tongue out standing in river in the countryside, trees in the background. Ecology and beauty in nature in rural environment.
    Amazing landscape with scenic Yangzhuoyong Lake, Tibet — Stock Photo
    Amazing landscape with scenic Yangzhuoyong Lake, Tibet
    An elephant trunk, Loxodonta africana, coiled together with water dripping off — Stock Photo
    An elephant trunk, Loxodonta africana, coiled together with water dripping off
    Tufted puffin swimming in water, rear view — Stock Photo
    Tufted puffin swimming in water, rear view
    Female Brown bear or Ursus arctos resting and sleeping on a driftwood log at the Alaska Wildlife Conservation Center with a pond in the background, South-central Alaska, Portage, United States of America — Stock Photo
    Female Brown bear or Ursus arctos resting and sleeping on a driftwood log at the Alaska Wildlife Conservation Center with a pond in the background, South-central Alaska, Portage, United States of America
    Empty plastic crumpled bottles waste lying on the seaside rock near clear water — Stock Photo
    Empty plastic crumpled bottles waste lying on the seaside rock near clear water
    Close-up of lettuce growing in a hydroponic greenhouse, Thailand — Stock Photo
    Close-up of lettuce growing in a hydroponic greenhouse, Thailand
    Traditional sailing boats — Stock Photo
    Traditional sailing boats
    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.
    Asia view of Earth globe, detailed and photorealistic 3d illustration on white background. — Stock Photo
    Asia view of Earth globe, detailed and photorealistic 3d illustration on white background.
    Underwater view of a beautiful tropical turtle — Stock Photo
    Underwater view of a beautiful tropical turtle
    Conceptual image of plastic bag pollution, full frame. — Stock Photo
    Conceptual image of plastic bag pollution, full frame.
    Asia with clouds view of Earth globe, detailed and photorealistic 3d illustration on white background. — Stock Photo
    Asia with clouds view of Earth globe, detailed and photorealistic 3d illustration on white background.
    Hawksbill turtle (Eretmochelys imbricata) on the beach, Cayo dos mosquises, Archipelago Los Roques National Park, Venezuela, South America — Stock Photo
    Hawksbill turtle (Eretmochelys imbricata) on the beach, Cayo dos mosquises, Archipelago Los Roques National Park, Venezuela, South America
    Amazing landscape with calm blue lake and scenic mountains in Tibet — Stock Photo
    Amazing landscape with calm blue lake and scenic mountains in Tibet
    Close-up view of green leaf and goldfish in calm water of pond — Stock Photo
    Close-up view of green leaf and goldfish in calm water of pond
    High angle view of glass teapot, cups and green leaf in pond with goldfish — Stock Photo
    High angle view of glass teapot, cups and green leaf in pond with goldfish
    Boy watering plants in the garden on a sunny day — Stock Photo
    Boy watering plants in the garden on a sunny day
    Water quality inspector taking sample of water at suspected pollution site — Stock Photo
    Water quality inspector taking sample of water at suspected pollution site
    Mekong river and brine well at Tibet mangkang county — Stock Photo
    Mekong river and brine well at Tibet mangkang county
    A green heron, Butorides virescens, standing in her nest with her chick — Stock Photo
    A green heron, Butorides virescens, standing in her nest with her chick
    South America side of Earth globe, detailed and photorealistic 3d illustration. — Stock Photo
    South America side of Earth globe, detailed and photorealistic 3d illustration.
    Aerial view of green field at countryside — Stock Photo
    Aerial view of green field at countryside
    Marabou stork standing in mud in Africa. — Stock Photo
    Marabou stork standing in mud in Africa.
    Amazing landscape with scenic Yangzhuoyong Lake, Tibet — Stock Photo
    Amazing landscape with scenic Yangzhuoyong Lake, Tibet
    12 year old girl looking at elephants, Moremi Reserve, Botswana — Stock Photo
    12 year old girl looking at elephants, Moremi Reserve, Botswana
    Wildlife warning sign in heather. — Stock Photo
    Wildlife warning sign in heather.
    Hippo, Hippopotamus amphibius, in waterhole, yawning and showing its teeth. — Stock Photo
    Hippo, Hippopotamus amphibius, in waterhole, yawning and showing its teeth.
    Lake shore with tree reflections — Stock Photo
    Lake shore with tree reflections
    Traditional sailing boat — Stock Photo
    Traditional sailing boat
    Detail of sunlight reflecting on clear alpine lake water, along the Pacific Crest Trail — Stock Photo
    Detail of sunlight reflecting on clear alpine lake water, along the Pacific Crest Trail
    Female Brown bear or Ursus arctos resting and sleeping on a driftwood log at the Alaska Wildlife Conservation Center with a pond in the background, South-central Alaska, Portage, United States of America — Stock Photo
    Female Brown bear or Ursus arctos resting and sleeping on a driftwood log at the Alaska Wildlife Conservation Center with a pond in the background, South-central Alaska, Portage, United States of America
    Mediterranean coastline of Greece with white buildings and windmills along the water edge; Greece — Stock Photo
    Mediterranean coastline of Greece with white buildings and windmills along the water edge; Greece