This subject is vast. It will have to be Argentina WhatsApp Number List so that it is compatible with the blog post format. In this article, we will only deal with laptops, whose production accounts for 17% of digital energy consumption. We will not deal with usage, networks or data centers. Here’s what the Shift Project tells us : For this article, I am relying on a study called “ Product Carbon Footprint (PCF) Assessment of Dell Laptop – Results and Recommendations ”, published in 2010 by Scott O’Connell and Markus Stutz . This study breaks down the carbon footprint of manufacturing a Dell Latitude E6400 computer. A somewhat old PC, released in 2008, but it is the only sufficiently precise study that I have to date.

The carbon footprint of the manufacture of the machine is counted to be worth approximately 151 kg eq CO2. More recently, in 2018, ADEME gave a similar order of magnitude: 124 kg eq CO2 for the manufacture of a laptop computer, without specifying its characteristics. The assembly has a rather low footprint (4 kg eq CO2), but that of transport to the customer represents almost a quarter of the total footprint (48 kg eq CO2 for a total of 151 + 48 + 4 = 203 kg eq CO2)! In fact, the products are transported to Europe and the United States by plane. Regarding the footprint of the extraction of materials, their transformation

Production, assembly, transport

The results of this study surprised me in more ways than one. The following graph shows the breakdown of the machine’s carbon footprint between the production of its components, their assembly, and the transport of the finished product to the customer. and the transport of components, they are included in the footprint of the production of components. Contrary to what I expected, the battery has a relatively low weight in the total carbon footprint of the machine’s manufacture: around 9kg CO2e, out of a total of around 151kg CO2e. In other words, in the manufacturing of a laptop computer, the carbon footprint of the battery represents about 6% of the total footprint of the machine.


RAM (in red), whose carbon footprint accounts for 37% of that of the motherboard, or 17% of the computer’s total footprint! The model studied is a 2008 Dell PC, with 2 GB of RAM. Most of the models produced today offer 16 GB. I have looked carefully, but I am not able to tell you to what extent this increases or not their carbon footprint. Intuitively, I would say that in any case, it does not help to decrease … The printed circuit (“substrate”, in light blue), the manufacture of which requires a lot of energy, which accounts for 24% of the carbon footprint of the motherboard, or 11% of the total footprint of the machine.

Breakdown of the carbon footprint

Do not be mistaken with the low share of transport indicated above: I remind you, this is the upstream transport of manufacturing which is done by truck, and not downstream transport which is partly done. by plane. The heaviest element in terms of carbon footprint is the motherboard and its components, which total 47% of the PC’s carbon footprint (71 kg eq CO2 out of a total of 150 kg eq CO2). The other standard components (“standard active components”, in light green) such as integrated circuits, transistors, diodes and LEDs on the motherboard. These components all contain a die , a small rectangular piece resulting from the cutting of a wafer , a very thin wafer of silicon, the production of which also requires a lot of energy.

Finally, the use of the PC counts relatively little in the total emissions: 2 kg eq CO2 per year on average for France. This is due to our low-carbon electricity mix (thank you nuclear, the world average is 29 kg eq CO2 per year, or 15 times higher). This use only takes into account the direct energy consumption by the PC, and not the energy consumed by the network infrastructures and the remote servers it runs. Most of the emissions of a PC during its life cycle (in France), from manufacturing to its end of life, are embodied energy , that is to say they are already on board as soon as it is installed. factory output !

Leave a Reply

Your email address will not be published.