Making real progress on climate initiatives requires a commitment to standards and process rigor. This is why organisations seeking carbon-conscious website accreditation follow a streamlined and guided process to demonstrate their commitment. The accreditation process helps ensure that the standards are consistent and transparent, and by requiring renewal, it encourages continuous improvement.
As part of the requirement for carbon-conscious website accreditation for your website, it's important that the website is green-hosted. This means that the hosting provider uses data centres powered by renewable energy to run their services. By selecting a hosting service that is entirely powered by renewable energy, you can significantly reduce your website's emissions. By using a green host, you can reduce the carbon emissions of a website by about 9%. If you're searching for a new hosting provider, the Green Web Foundation's database is a great place to start. It features nearly five hundred hosting companies worldwide that have a proven commitment to using green energy in their data centres.
Should your website be on standard hosting, or even if it's green-hosted but not reflecting as such, an additional 10% will be added to the overall carbon footprint. This measure ensures that responsibility is taken for the site's environmental impact.
The first step is to calculate the amount of carbon produced by your website. This can be done by multiplying the number of monthly page views by the average emissions per page view. For example, a website with 5,000 monthly page views and average emissions of 1g of CO2e per page view would result in roughly 60 kg of carbon per year. The same website with 500k monthly page views is estimated to emit 6 tonnes of carbon per year. For accredited websites, even if the average carbon is under 0.65g per page view, each page view of a website is considered as 1g of CO2e meaning that you'll be taking responsibility for more carbon than what the website produces.
Insetting is the recommended route for taking responsibility for website's annual carbon footprint. Take responsibility by reducing emissions associated with your business operations, suppliers, products, or services. If insetting isn't feasible, as a last resort, consider offsetting your emissions by investing in projects like reforestation or renewable energy. You can do so by contributing to a Gold Standard, Verified Carbon Standard project through a recognised and credible supplier.
If you haven't done insetting or haven't taken responsibility for your website's yearly carbon footprint, for our non-free website accreditations, we step in at the 6th month and take responsibility through nature/community projects on behalf of your website to ensure that the website has a clear net positive impact on the environment.
The energy consumption of a website is closely tied to the amount of data that is transferred during page loading. The calculation of websites' carbon emissions is guided by our colleagues, using a standardised public methodology that incorporates CO2.js from The Green Web Foundation. A website's carbon emissions are estimated using several factors, which include data transfer during page loading, internet data energy intensity, data centre energy source, and electricity carbon intensity. The carbon calculation based on CO2.js measures the data transfer and multiplies it by data on energy consumption to determine the carbon emissions. Additionally, certain website visitors may have already cached website files on their devices are factored in and adjusted for subsequent visits accordingly. The carbon intensity of grid electricity is based on the international average reported by the International Energy Agency (IEA).
At EFWA, beyond our dedication to research, development, and innovation, we stand alongside our industry colleagues, harmonising a unified and up-to-date approach to measuring website carbon emissions. Our active involvement includes being a founding contributor to ComputerWeekly's IT Sustainability Think Tank and providing steadfast support to our fellow industry members and collaborators through participation in the W3C SustyWeb Community Group. Whether it's sharing knowledge, exploring new ideas, or collaborating on initiatives, we believe that working together is the best way to achieve our goal of creating a more sustainable cleaner greener internet.