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Weed-munching weevils released to clear 'harmful' water fern

Stream turning blue sparks investigation

Swimmers warned over river sewage and pollution

Project to tackle River Mersey plastic litter

Group aims to save county's 'dying' rivers

Pollution causing river ‘death by a thousand cuts’

Volunteers needed to pull out invasive plant

Croquet used to decide river's pronunciation

The most plastic-polluted riverbed in the UK. Video, 00:02:13The most plastic-polluted riverbed in the UK

´óÏó´«Ã½ Inside Science. Microplastics in UK river beds. Audio, 36 minutes´óÏó´«Ã½ Inside Science

Thousands of fish killed in 'pollution' of river

'We can't afford to lose this amazing habitat' Video, 00:01:59'We can't afford to lose this amazing habitat'

Where plastic waste in oceans is coming from. Video, 00:02:27Where plastic waste in oceans is coming from

New weir to be built below medieval Thames bridge

Water companies illegally dumping sewage in rivers

Hundreds of sewage leaks detected thanks to AI

Bid to scrap Wales' farming pollution rules fails

Wild swimming in winter 'makes me feel alive' Video, 00:01:27Wild swimming in winter 'makes me feel alive'

Human damage done to more than half of all rivers

New pollution rules 'compel farmers to change'

The Essay. Odes to Essex, Washed Up in Essex. Audio, 14 minutesThe Essay

Aerial photographer showcases 'tree of life' images