Ecommerce delivery does not increase carbon emissions, but weekly supermarket runs do

However, the story goes even further. In the U.S., the average grocery store basket is valued at around $34 and weighs roughly 20 pounds. This means that cars moving in and out of a supermarket never carry a tonne in load, but on average carry only about 1/100th of a tonne. This causes their specific energy intensity to increase, averaging 400,000 BTUs per tonne mile – a reduction of 400 times in energy efficiency compared to a tractor-trailer. 

“This is caused primarily by consumers breaking up last-mile movement into numerous discrete individual payloads. In fact, the smallest of these payloads have energy intensity that is another 10 times worse, causing millions of BTUs per tonne mile. And here, we can have a distribution system that can easily reduce BTUs consumed by about three orders of magnitude,” said DeDomenico. 

DeDomenico pointed out that retail goods movement in the U.S. accounted for almost 7 percent of primary energy consumption in the country, where total consumption equals roughly 100 quadrillion BTUs per year – the equivalent of about 8 gallons of gasoline per day per person. 

To effect a change, it is essential to create a discrete payload utility distribution system that delivers goods at the expense of much lesser BTUs per tonne mile. DeDomenico calls it the ‘physical internet’ – an interconnected network through which discrete physical parcels can be moved between any two points in the network. 

DeDomenico’s startup CargoFish is currently building its first demonstration, with this model being the sixth generation in a line of functional prototypes that have been tested and improved over the last eight years. DeDomenico hopes that the commercial installation of the system will be financed by government bodies or private entities, in a manner that is similar to other utilities like gas or water lines. 

Though an ambitious project, DeDomenico believes that change will come in due time, and that a comprehensive demonstration will help convince authorities and the public on the concept, and divert investment from the more popular low-carbon emission alternatives like electric cars and mobility-as-a-service systems to the physical internet.