He is approaching the tidal Thames which has recently received 500,000 cubic metres of raw sewage thanks to heavy rain overflowing a system designed for Victorian England.
Hmmm.... not sure I'm really selling the capital as a great eco-friendly city. Honestly, London is one of the - if not the - greenest city around and the Thames is thriving.
However I must admit that at times of overflow the Thames only is kept oxygenated due to repeated injections by a fleet of Bubblers (above). Come on - just build that super-sewer already!
See more here on a highly scientific experiment to discover how clean Thames water really is.
