That might once have been true, and it’s far from perfect, but the Thames is a cleanup success story: http://www.bbc.co.uk/earth/story/20151111-how-the-river-t

That might once have been true, and it’s far from perfect, but the Thames is a cleanup success story: http://www.bbc.co.uk/earth/story/20151111-how-the-river-thames-was-brought-back-from-the-dead http://www.bbc.co.uk/earth/story/20151111-how-the-river-tham...