Sustainable living Calculators

Books vs E-books Calculator An e-reader has to replace about sixty printed books before it is ahead. Car vs Bike Calculator A bicycle is not zero — the food to pedal it counts — but it is about thirty times better. Cigarette Butts Calculator The filter is cellulose acetate, a plastic — which is why butts are the most littered item on Earth. Drip Faucet Calculator One drip a second is 3,000 gallons a year — the arithmetic of small things repeated often. Event Sustainability Calculator Spectator travel dominates a major event's footprint — the venue is a rounding error beside it. Global Plastic Policy Calculator Recycled plastic is about half the carbon of virgin, which is a large saving and not zero. PHEV Economy Calculator A plug-in hybrid nobody plugs in is a heavy hybrid hauling a battery it never uses. Tap Water Calculator About 140 litres a person a day, and showers and toilets are most of it. Tree Benefits Calculator A mature tree absorbs about 22 kg of CO2 a year — real, useful, and smaller than most people hope. Water Demand Calculator A bath is roughly nine minutes of showering, which is the comparison most people get wrong.