The UK introduced a 5p charge for plastic bags and saw usage reduced by >80%: https://www.telegraph.co.uk/news/2016/07/30/britain-banishes-plastic-bags-as-5p-ta

The UK introduced a 5p charge for plastic bags and saw usage reduced by >80%: https://www.telegraph.co.uk/news/2016/07/30/britain-banishes-plastic-bags-as-5p-tax-sees-usage-plummet-by-6/ https://www.telegraph.co.uk/news/2016/07/30/britain-banishes... > The total number used fell from over seven billion a year to less than half a billion in the first six months of the policy, saving 40,801 tons of plastic, which is the equivalent weight of roughly 300 blue whales.