Block 1:
The Impact

Debunking the Myth

​ICT Emissions

Current ICT Emissions:

• 1.8% - 3.9% of global GHG emissions.

• 15% by 2040

Talking about climate change is important. But why did the world’s largest climate conference overlook its own digital footprint?

​​Intent

Despite the good intentions, the industry lacks a standard way to measure the environmental impact of software.

​​Reality

Active Break

Stand up, stretch, and let the principles sink in.

Block 2:
The 8 Principles

The Core Pillars of Sustainability

"Green software is software that is responsible for emitting the least amount of carbon possible." — Asim Hussain, Executive Director of the Green Software Foundation.

What is green software?

​Check lowwwcarbon.com

The greenest energy is the energy you don’t use.

Energy efficiency is doing more with less.

Principle 2:
Energy Efficiency

​Carbon awareness is the practice of doing more when the energy is clean and less when it is not.

​

Principle 3:
Carbon Intensity

​visit https://lowcarbonpower.org/map

The greenest hardware is the one you already own.

​Principle 4: Embodied Carbon

The most efficient server is a busy server.

An idle server consumes 50% of it's maximum power

​​Principle 5:
Engergy Proporcionality

​ The network is a massive part of the ICT footprint.
To be green, we must reduce the payload and the distance it travels.

​​Principle 6:
Networking

​Infrastructure and Networking

Instead of shaping energy supply to meet software demand, we shape software demand to meet energy supply.

​Principle 7:
Demand Shaping

You cannot optimize what you do not measure.

​Principle 8: Measuring and Optimization

Active Break

Stand up, stretch, and let the principles sink in.

Block 3:
The SCI Metric

Moving from Sentiment to Math

The SCI Equation

​how do we measure?

Day 1 Complete

Sustainability is not a 'nice-to-have' feature; it is a new dimension of software quality.

Thank you!

References & Further Reading

​Caballar, R. D. (2024, March 23). We need to decarbonize software. IEEE Spectrum. https://spectrum.ieee.org/green-software
Green Software Foundation. (n.d.). Principles of green software. https://principles.green/
Green Software Foundation. (2023). Software carbon intensity (SCI) specification (Version 1.0). https://grnsft.org/sci
Hussain, A. (2022). Green software engineering principles [Training material]. Green Software Foundation. https://learn.greensoftware.foundation/
Hussain, A. (2024). Green software and software quality [Web article]. Green Software Foundation. https://greensoftware.foundation/
International Energy Agency. (2023). Data centres and data transmission networks. https://www.iea.org/reports/data-centres-and-data-transmission-networks
Low Carbon Power. (2024). Real-time electricity carbon intensity map. https://lowcarbonpower.org/map