Green Internet: The connection between accessibility and sustainability

Digitalisation is shaping our everyday lives like never before. What is often overlooked: The internet is a significant environmental factor. If it were a country, it would be the world's fourth largest polluter. The average website generates around 0.5 grams of CO2 per visit - with 10,000 monthly page views, this adds up to around 60 kilograms of CO2 per year, and that's just for a single sub-page. In this context, sustainable website design takes on a whole new meaning.

But sustainability in the digital space is about more than a good carbon footprint. It is a holistic approach that combines environmental, social and economic aspects. Ecologically, through reduced energy consumption; socially, through improved accessibility for all; and economically, through higher conversion rates due to faster loading times and better search engine rankings. Accessibility, green coding, green UX and sustainable hosting are particularly important.

Accessibility as the cornerstone of sustainability

Digital sustainability is closely linked to the removal of digital barriers. No matter how energy efficient a website is, if it cannot be used by everyone, it is failing an important aspect of sustainability. Accessibility means

- Clear structure and intuitive navigation

- Adequate colour contrast and flexible text sizes

- Alternative text for images- Subtitles for videos

- Customisable user interfaces for individual needs

Modern technologies such as Eye-Able® make it possible to make websites accessible to a wide range of users without having to completely overhaul the basic structure. This is particularly important as Germany is home to around 10 million people with disabilities and many more could benefit from accessible services.

Technical Sustainability: Green Coding and Hosting

Green coding aims to program software in a resource-efficient way. This not only reduces energy consumption but also improves performance. It also reduces the risk of system failure and the cost of technical support. Key principles are

- Efficient algorithms

- Minimising HTTP requests

- Optimisation of media content

- Clean, maintainable code

A practical tip: compress images before uploading. Tools such as TinyPNG can significantly reduce file size without noticeably affecting image quality. Tools such as Squoosh can automatically convert conventional image formats to WebP, which can reduce file size by up to 30% compared to JPG or PNG while maintaining visual quality. This not only speeds up loading times, but also saves valuable storage space and energy.Green Hosting complements these efforts by

- Use of renewable energy

- Energy efficient server infrastructure

- Choice of location for optimal data transfer

Green UX: usability meets sustainability

Green UX combines usability with sustainability principles. The aim is to design websites in a way that is intuitive to use and conserves resources:

- Minimalist, functional design

- Efficient information architecture

- Reduction of unnecessary animations

- Accessible navigation elements

A concrete example is the implementation of a "dark mode". This not only saves energy on OLED displays, but also improves accessibility for people with visual impairments.

Practical steps for a sustainable website

Here are some measures that can be implemented immediately:

1. lazy loading for images and videos

2. effective browser caching

3. optimise fonts

4. review and optimise analytics tools

5. integrate accessibility features

To check the sustainability of your website, we recommend tools such as Website Carbon Calculator or EcoGrader.

Conclusion

Sustainable websites are an investment in the future. They combine environmental protection with social responsibility and economic success. By combining green coding, accessible design and an efficient user experience, we create digital spaces that are truly accessible to all, while conserving resources.Digital transformation gives us the opportunity to think and act sustainably right from the start. Every step towards a more sustainable website counts - from accessible design to efficient coding to green hosting. It is an investment that will pay dividends for your business, your users and our planet.

[Author information: Linda Bühler is Corporate Communications Manager at the Cologne-based digital agency dotfly. The agency advises and supports companies and brands that are good for the environment and society in all areas of digital communication - from strategy, concept and design to technical implementation and marketing].