
According to a report by GigaOm, Black Friday is 50 times more carbon intensive than Cyber Monday shopping. While the report is imperfect, it shows how driving cars to the mall en masse is not an eco-friendly way to shop.
One suggestions to reduce the footprint (and cost) of online shopping is to avoid overnight shipping (air freight). According to The Daily Green ground transportation is better than rush delivery. Ground shipping is six times more energy efficient than air. Not only do airplanes release more greenhouse gases (GHGs) than terrestrial vehicles, they release these GHGs higher in the atmosphere, which has a greater adverse impact on global warming than gases emitted at ground level. Data from the Center for Energy Climate Solutions shows that even when using overnight shipping, the carbon impact of buying online is a fraction of driving to a mall or store.