Collecting data in the River Lea, London (IMAGE)
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Collecting data in the River Lea, Hackney Downs, London, surveying for freshwater invertebrates using the ‘Riverfly’ citizen science method, which is used across the UK by volunteers. Invertebrates are sensitive to changes in water quality, so they are a good indicator of pollution. Credit: Dr Izzy Bishop
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Dr Izzy Bishop, UCL
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