At the next stage, the recycling is given a first pass by a small team of human sorters. According to Tim Duret, director of sustainable technology at Veolia in the UK, 80% of the sorting is done by machines and 20% is done by hand. These first human sorters search for large items that shouldn't be there and might slow down the machines, such as clothes or towels, which can get tangled up. On my visit, two bins filled with frying pans stand to one side, and a beaten up microwave is pulled from the belt. These definitely shouldn't be in with the domestic recycling.

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