00:00 Blue-green algae, also known as cyanobacteria, produces toxins in rivers and lakes,
00:06 devastating fragile aquatic ecosystems, starving them of oxygen.
00:10 A combination of high temperatures and harmful nutrients, including phosphorus,
00:15 entering the water from sewage works, agriculture and septic tanks
00:19 is thought to be contributing to the issue.
00:21 Areas in Northern Ireland, the Lake District, Norfolk and Bedford have encountered the algae,
00:28 which can be harmful to dogs and humans.
00:31 Dog owners had been warned to stay away from the Barton Broad in Norfolk,
00:36 with visitors to Bedford's Priory Country Park also being warned over the bacteria.
00:41 It's hard to spot unless it has collected together,
00:44 where it can often resemble foam and can be found at the edge of lakes or ponds.
00:50 It can also cause lakes to appear green, with several species producing musty or grassy odours.
00:56 people are being urged to avoid any contaminated areas.
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