River Ecosystems - Question

Part of the debate – in the House of Lords at 3:22 pm on 27th February 2019.

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Photo of Viscount Ridley Viscount Ridley Conservative 3:22 pm, 27th February 2019

My Lords, the Northumberland Rivers Trust, of which I was at the time a trustee, tried to solve the problem of poor water quality in the River Blyth in spring and summer, when it went turbid and cloudy and there was a detrimental impact on the ecosystem. After doing a lot of work on farms, it was concluded that the main problem was the invasive alien signal crayfish. Does my noble friend agree that invasive alien species are a form of pollution that can be even more damaging than other forms?