Earlier quoted context omitted.
I did some napkin math on this as I recently picked up a 3D Printer and wondered the environmental comparison to print-at-home vs pick something up at the store and I was surprised. Had some help from Claude but "last mile delivery" is absolutely where the majority of the kWh is burned in the supply chain. Container ships use ~0.015 kWh per ton-km[1] and a car is ~1.35 kWh/km. If you go to the store and end up gettin…
> Not an expert though just saying it opened my eyes to how inefficient "last mile delivery" energy consumption is. One of the oddities of home shopping and delivery is that it can be more efficient. https://www.npr.org/2024/09/10/nx-s1-5020321/food-delivery-m... > In 2022, researchers from the University of Michigan and Ford Motor Co. modeled a single 36-item grocery cart to compare greenhouse emissions from an e-co…
USDA study: >Overall, households are, on average, 2.2 miles from the nearest SNAP-authorized supermarket or supercenter, but their usual store is 3.8 miles away.
Based on these questions: >This report presents initial findings from the FoodAPS survey on three key questions:
1. How do shoppers travel to their main store and how far do they travel to get there?
2. In what type of store (eg., supermarket, mass merchandiser, convenience store) do U.S. households typically shop for groceries?
3. Do store and travel mode differ by participation in food assistance programs or food security status?
This can only tell us the distance to the store and does not support "All these car trips result in carbon pollution: over 17 million metric tons of CO2 come from car tailpipes just from driving back and forth to the grocery store."
In order to draw that conclusion, you need to show that the travel to and from grocery store was single purpose. Which is not supported by the data.
Most people I know don't go out of their way to go grocery shopping nor do they take specific trips to do so. It will be done in conjunction with another outing or when returning from work.
This could also! explain the reason that food secure people travel greater distance, as they tend to travel greater distance overall they choose a location closer to their travel route rather than their dwelling.