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    • Oxygen Levels
  • (5)
Blue Green algae on the shores of Lake Windermere, Ambleside, Lake District, UK. Blue Green algae is toxic and is becoming far more frequent as temperatures rise due to climate change. June 2014
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90788879 Blue Green algae on the shores of Lake Windermere, Ambleside, Lake District, UK. Blue Green algae is toxic and is becoming far more frequent as temperatures rise due to climate change. June 2014© Ashley Cooper
Man with laptop computer on  48m high  tower used to collect data about the CO2 and O2 levels. Tropical rainforest, Barro Colorado Island, Gatun Lake, Panama Canal, Panama. November 2012.
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90729372 Man with laptop computer on 48m high tower used to collect data about the CO2 and O2 levels. Tropical rainforest, Barro Colorado Island, Gatun Lake, Panama Canal, Panama. November 2012.© Cyril Ruoso
A high 48m tower used to collected data about the CO2 and O2 levels. Tropical rainforest, Barro Colorado Island, Gatun Lake, Panama Canal, Panama.
90729371
90729371 A high 48m tower used to collected data about the CO2 and O2 levels. Tropical rainforest, Barro Colorado Island, Gatun Lake, Panama Canal, Panama.© Cyril Ruoso
Common European toad egg strings (Bufo bufo) hanging in the waterplants in order to get sufficient oxygen, sand-winning pit, Holland  -  Willem Kolvoort/ npl
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90207221 Common European toad egg strings (Bufo bufo) hanging in the waterplants in order to get sufficient oxygen, sand-winning pit, Holland© Willem Kolvoort / NPL
Man rescuing fish after run-off water from fire-fighting operation reduced oxygen levels in canal, causing many fish to die, Erewash Canal, Derbyshire, England, February  -  Jack Perks/ FLPA
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80174733 Man rescuing fish after run-off water from fire-fighting operation reduced oxygen levels in canal, causing many fish to die, Erewash Canal, Derbyshire, England, February© Jack Perks / FLPA
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