Walking along the Thames Path not from from the O2 arena is a large site that has signs up saying recycling. However it is a plant that crushes rocks to gravel. I assume this is then used for roads. From here it is sent down chutes onto boats. Its destination I don't know. I wonder how long it will remain as more and more of the banks of the Thames are being turned into apartment blocks. Maybe the falling house prices might see it last a little longer.