No one wants these slips. But we currently don’t have much choice in the matter. The reality is these small pieces of paper are so much more than a mere annoyance. They are costing us much of our hard-earned money and the planet its precious resources. It takes more than 900 million litres of oil, 10 million trees and nearly 4 billion litres of water to create the receipts for the United States alone, generating almost one billion kilograms of waste.