arXiv subjects

Gauthier Roussilhe

Publications and source records attributed to Gauthier Roussilhe.

4 recordsLinked to original sources

arXiv2026

Too cheap to matter: over abundant microchips, and what we can learn from them

Ultra-cheap microchips (<$1) are so abundant they've become a 'smart material' integrated and disposable in everyday things. Hidden in our everyday products, we have entirely lost sight of them, yet they account for the vast majority of the >400 billion pieces sold each year. As new technology nodes are released, older ones (from as far back as the 1980s) continue to be produced. These microchips do not exist on their own; they are packaged into every possible item to bring 'smartness', necessary or not; this simultaneously increases their obsolescence. While the latest ICs power our data centres and AI revolution that draws our attention, what about technology so disposable that it has become entirely invisible? We report on our workshop at ICT4S exploring these devices' true costs, and pose challenges to the LOCO community to push back on this system, and develop the skills necessary to create lasting technology and avoid further e-Waste.

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arXiv2026

Counting own goals: High-level assessment of the economic relationship between the ICT and the Oil and Gas sectors and its environmental implications

The ICT sector has been one of the most successful and fastest-growing industry in history. While the environmental issue in this sector has mainly been addressed by assessing its footprint and, to a lesser extent, its avoided emissions or net impacts, the additional emissions from the digitalization of carbon-intensive activities, such as the Oil and Gas (O&G) sector, have rarely been discussed. By doing so, we have forgotten to count the own goals conceded over more than 20 years in the troubled relationship between the ICT and the O&G sector. Using input-output analysis and economic data ranging from 2000 to 2022, we observe that on average 2% of the annual financial flows from the ICT sector are directed towards the Oil and Gas sector. Considering the significant growth of the ICT sector during this time, O&G companies now spends a massive amount on ICT products in absolute terms. It also appears that in 2022, for each dollar going from the ICT sector to the renewable and nuclear energy industry, more than $4 go to the O&G industry. In addition, we also provide a classification of digital activities in the O&G sector to facilitate environmental assessments and present two case studies estimating potential added emissions from the digitalization of oil activities. Finally, looking at the immense growth in generative AI, we provide an exploration of causal links between the current success of GPU technology and its intricate early relationship with the O&G sector. This article lays the groundwork for defining the nature of the relationship between ICT and O&G, which predates the current hype surrounding generative AI. We provide the analytical elements needed to begin estimating the added emissions from the digitalisation of O&G.

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arXiv2025

Purer than pure: how purity reshapes the upstream materiality of the semiconductor industry

Growing attention is given to the environmental impacts of the digital sector, exacerbated by the increase of digital products and services in our globalized societies. The materiality of the digital sector is often presented through the environmental impacts of mining activities to point out that digitization does not mean dematerialization. Despite its importance, such a narrative is often restricted to a few minerals (e.g., cobalt, lithium) that have become the symbols of extractive industries. In this paper, we further explore the materiality of the digital sector with an approach based on the diversity of elements and their purity requirements in the semiconductor industry. Semiconductors are responsible for manufacturing the key building blocks of the digital sector, i.e., microchips. Given that the need for ultra-high purity materials is very specific to the semiconductor industry, a few companies around the world have been studied, revealing new critical actors in complex supply chains. This highlights strong dependencies towards other industrial sectors with mass production and the need for a deeper investigation of interactions with the chemical industry, complementary to the mining industry.

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arXiv2022

From Silicon Shield to Carbon Lock-in ? The Environmental Footprint of Electronic Components Manufacturing in Taiwan (2015-2020)

Taiwan plans to rapidly increase its industrial production capacity of electronic components while concurrently setting policies for its ecological transition. Given that the island is responsible for the manufacturing of a significant part of worldwide electronics components, the sustainability of the Taiwanese electronics industry is therefore of critical interest. In this paper, we survey the environmental footprint of 16 Taiwanese electronic components manufacturers (ECM) using corporate sustainability responsibility reports (CSR). Based on data from 2015 to 2020, this study finds out that our sample of 16 manufacturers increased its greenhouse gases (GHG) emissions by 7.5\% per year, its final energy and electricity consumption by 8.8\% and 8.9\%, and the water usage by 6.1\%. We show that the volume of manufactured electronic components and the environmental footprints compiled in this study are strongly correlated, which suggests that relative efficiency gains are not sufficient to curb the environmental footprint at the national scale. Given the critical nature of electronics industry for Taiwan's geopolitics and economics, the observed increase of energy consumption and the slow renewable energy roll-out, these industrial activities could create a carbon lock-in, blocking the Taiwanese government from achieving its carbon reduction goals and its sustainability policies. Besides, the European Union, the USA or even China aim at developing an industrial ecosystem targeting sub-10nm CMOS technology nodes similar to Taiwan. This study thus provides important insights regarding the environmental implications associated with such a technology roadmap. All data and calculation models used in this study are provided as supplementary material.

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