One Did It it uses the ecological backpack or eco-backpack method to illustrate the volume of natural resources we consume. Eco-backpack calculations are based on the MIPS-method developed in the early 1990s in the Wuppertal Institute, Germany. MIPS stands for Material Input Per Service Unit. The method can be used to estimate the environmental burden caused by a product, service, or even a lifestyle. The entire life cycle from cradle to grave (extraction, production, use, waste and recycling) is considered.