How many bins do you need?

Last year Prime Minister Rishi Sunak congratulated himself for scrapping plans to make households sort waste into seven different bins. The plan mainly existed in Rishi’s mind, which made if very easy to scrap. But it does raise an important question – how many bins is the right number?

I ask because I had a press release recently from the Northern rail company, who currently sort their waste into a total of 33 different bins. Rishi would spontaneously combust at the thought of it.

Why 3...