Francesco Fullone https://linkedin.com/in/fullo Principles of Green Software Engineering what are and how they impact 

Triple Bottom Line coping with sustainability complexity Sustainability is the capacity to endure. Meet[ing] the needs of the present generation without compromising the ability of future generations to meet their needs” (UN, WCED, 1987: 43) 

Triple Bottom Line coping with sustainability software complexity Technical Debt + CyberSecurity + Infrastructure Resilience Impact on the environment + E-waste + Energy Consumption Accessibility, Usability and Inclusion + Business Impact on stakeholders Francesco Fullone https://linkedin.com/in/fullo 

Let’s focus on the Environment 

72.35 Mt of CO2 comparable to carbon footprint of Austria Bitcoin carbon footprint https://digiconomist.net/bitcoin-energy-consumption 

43.21 kt as much as the Netherlands e-waste Bitcoin Electronic Waste 

0.9% - 1.7% as much as all residential lightning in the US Bitcoin total electric usage in US 

No content

• Energy proportionality measures the relationship between power consumed by a computer and the rate at which useful work is done • Clean energy is better than that generated by fossil fuels or high-carbon sources • Green Software takes responsibility for its electricity consumption Energy Efficiency don’t waste a single drop of energy and chose the cleanest 

No content

Hardware Efficiency see it as embodied carbon • Extend hardware lifespan, to amortize carbon in more years • Increase the utilization of devices • Choose public cloud instead of on-premise cloud as it can apply demand shifting as well as demand shaping in a more energy efficient way • Write software optimized for efficient hardware usage 

c.a. 120 Mln produced between 2019 and 2020 

Carbon Awareness understand CO2 impacts and emissions • The energy consumed could have different impact in terms of carbon intensity • Geographical location of hardware has an impact on the carbon intensity • Each choice you do (or don’t) is reflected in carbon emissions • Measure and improve 

Software Carbon Intensity 

Green Software Principles The six key areas to be aware of • Energy Efficiency: use the least amount of energy possibile • Hardware Efficiency: use the least amount of embodied carbon possible • Carbon Awareness: choose to consume cleaner energy • Carbon Efficiency: emit the lest amount of carbon possible • Measurement: what it can’t be measured, it can’t be improved • Climate Commitments: understand the exact mechanism of carbon reduction https://greensoftware.foundation 

NET-ZERO! Carbon neutral 

Green Software Principles as the tip of a pyramid of possibilities 

Francesco Fullone Sustainability Designer http:/ /linkedin.com/in/fullo pick your pillar