Numérique Responsable

In the speed-obsessed world of today, better performance comes with serious business gains. This frontend performance checklist is a cumulative list of items that we at Crystallize found important in 2025 when creating a Superfast web application.

Cloud sustainability could soon become a key performance metric. Read on to learn about important cloud sustainability trends and statistics.

Building Green Software by Anne Currie, Sarah Hsu and Sara Bergman, published by O'Reilly is available here under a CC BY-NC-ND Creative Commons license i.e. you can read it and quote it for non commercial purposes as long as you attribute the source (O'Reilly's book) and don't use it to produce

Building Green Software by Anne Currie, Sarah Hsu and Sara Bergman, published by O'Reilly, is available here under a CC BY-NC-ND Creative Commons license i.e. you can read it and quote it for non commercial purposes as long as you attribute the source (O'Reilly's book) and don't use it to produce

I once worked with a UI designer who insisted it was impossible to create a product that was both within the Web Content Accessibility Guidelines (WCAG) and aesthetically pleasing. ‘It can be pretty…

This blog post aims to flesh out some of my own thoughts on the metrics we use for web sustainability, with a particular focus on carbon emissions and energy use.

Enabling Digital Sustainability Through Granular Energy Measurement - FairCompute/energy-monitoring-tool: Enabling Digital Sustainability Through Granular Energy Measurement

If you've put in the work to select an eco-friendly hosting provider for your website, here's how to tell the world about it.

Choosing an eco-friendly web host is one of the most environmentally impactful decisions you can make when setting up a new website. Here are 3 key things to check when evaluating the sustainability of a hosting provider.

Over the last two decades, the European Commission has been driving a process of implementation of life cycle thinking in European product policies. With the development, in a first stage, of the International Reference Life Cycle Data System (ILCD), and thereafter of the European Environmental Footprint methods (EF), the life cycle approach has become a major lever for guiding European policies and investments towards the environmental sustainability goals that the European Union has committed itself to. The Product Environmental Footprint (PEF) and the Organisation Environmental Footprint (OEF) are life cycle assessment (LCA) based methods to measure and communicate the potential life cycle environmental impact of products (goods or services) and organisations, respectively. Together they form the basis for the EU Environmental Footprint. The technical details of the EF methods are laid down in the Commission Recommendation (EU) 2021/2279 (Annexes I-II-III-IV). Additional guidance documents on the EF methods have been developed during the first applications of the PEF/OEF in the pilot phase (2013-2018) and in the transition phase (2019-2022). This report provides a simple guide to PEF and OEF, aimed at people who want to know more details about the Environmental Footprint and its main methodological aspects, and people who want to have fast and direct access to the most up-to-date documents, webpages and tools for a more in-depth analysis.

Sprout* is a no-code website builder that helps you effortlessly create websites that emit 99% less CO2 in minutes

A plain-language guide to WCAG accessibility standards. Friendly explanations that make accessibility easier to understand, one criterion at a time.

Web Sustainability Guidelines - Design Priority Tool - mgifford/wsg-priority

How Big Companies Can Cut Costs and Carbon Through Smarter Software Operations

The Agile Sustainability Initiative is an effort to create awareness about sustainability within the Agile community and explore how Agile can contribute to a more sustainable future.

The internet is an invisible yet essential part of modern life — but its environmental impact often goes unnoticed. As more organizations commit to climate action, one key question emerges: Is our digital presence helping the cause, or quietly adding to the problem? To answer this question, we’re excited to release the #EcoWeb Report 2025,… Read More »#EcoWeb Report 2025: Benchmarking Digital Sustainability in the Climate Sector

The one where I shrink my paths

Sopra Steria publie un rapport inédit sur l’impact de l’IA sur l’environnement

Newton’s Cradle with one red ball hanging on a thread, retracted and about to bang into five silver balls also hanging by threads. Motion sensitivity is a...

Presented at the ACUNS 2025 Annual Meeting in Nairobi, Kenya, this policy brief examines the ecological impact of United Nations' websites and proposes a framework for integrating sustainable web practices across the system.