SustainableWebDesign.org

Creators:: Mightybytes and Wholegrain Digital
Source:: https://sustainablewebdesign.org

Description

Sustainable web design is an approach to designing web services that puts people and planet first. It delivers digital products and services that respect the principles of the Sustainable Web Manifesto: clean, efficient, open, honest, regenerative, and resilient.

Strategies

Design

https://sustainablewebdesign.org/category/design/

Development

https://sustainablewebdesign.org/category/development/

Calculating carbon emissions of web services

Webpage: https://sustainablewebdesign.org/calculating-digital-emissions/

Why is it difficult?

GHG Protocol

It is designed to work with well known standards like the GHG Protocol Corporate Standard, to allow an organization to model the environmental impact from digital services, typically as part of their Scope 3, or supply chain emissions.

System segments

Source: @Andrae.2020.NewPerspectivesInternet

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Emissions Calculation Formulas

Constant value of 0.81 kWh/GB is derived from raw data for the β€œExpected 2020 scenario” from the Andrae study. It tries to include the energy consumption of all system segments: consumer device use (52 %), network use (14 %), data center use (15 %) and hardware production (19 %).

The model also tries to account for caching:

Energy per visit in kWh

E = [Data Transfer per Visit (new visitors) in GB x 0.81 kWh/GB x 0.75] + [Data Transfer per Visit (returning visitors) in GB x 0.81 kWh/GB x 0.25 x 0.02]

Emissions per visit in grams CO2e

C = E x 442 g/kWh (or alternative/region-specific carbon factor)