The UK uses about 15 million tonnes of cement each year https://www.statista.com/statistics/476761/cement-consumption-in-the-united-kingdom-uk/ https://www.stat

The UK uses about 15 million tonnes of cement each year https://www.statista.com/statistics/476761/cement-consumption-in-the-united-kingdom-uk/ https://www.statista.com/statistics/476761/cement-consumptio... This concrete recipe uses up to 20% weight of coffee per weight of cement, so if all concrete used this recipe the UK would need 3 million tonnes of dried spent coffee grounds per year. The UK population is about 60 million, so each person would need to produce about 140g used grounds each day. Assuming the dried spent grounds are about the same weight as the fresh grounds that went into the coffee, that’s enough for more than 2 litres of coffee per person each day.