For years there have been calls to ditch weight as a measurement for waste and use carbon instead. An analysis of Scotland’s rubbish showed that the five most carbon-intensive waste materials make up just six per cent of waste by weight but nearly a third of associated carbon impacts (it’s worth noting that food was the worst offender, generating 17 per cent of the country’s carbon impacts in 2015). But minutes seem set to become the metric of choice when talking about waste.