Will kingfishers benefit from the Olympics?

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Media captionTaking a 'green' tour of the London Olympic site

There's less than six months to go before the opening ceremony - so are plans on course to make this the greenest Games ever?

I visited the Olympic Park to see what progress was being made - here's my report.

It may look a bit like a building site at the moment.

But come the summer, organisers say there will be wetlands for birds to come back to, chunks of the River Lea will have been cleaned up, and 2m tonnes of contaminated soil will have been treated.