It feels simple: You shop, find something you want and click to buy. It shows up today, overnight or tomorrow. We’ve gotten used to that speed. But that convenience comes with a climate cost. Multiple factors shape the environmental toll of a delivery. These include the distance from a fulfilment centre, whether the shipment rides in a half-empty truck, how many trips a driver makes in the same area and the type of transportation used to move the package. When customers choose faster shipping