Alien plants invade River Lagan

BBC: River Lagan under attack from invading alien plants Floating Pennywort can grow up to 20cm a day Continue reading the main story The River Lagan, one of Northern Ireland's major waterways, has been attacked by a highly invasive aquatic plant. Floating pennywort has been discovered along its banks. So far over five tonnes of the weed has been removed. The plant is native to North America. It was first brought into Ireland as a plant for tropical aquariums and ponds, but it has since......

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