“Thank you for recognising the importance of this approach to website design & builds. We’re absolutely thrilled to be included in this list for our work with the Climate Group. The planet needs to be a stakeholder in all websites, and sustainability has to be a non functional requirement just like accessibility or security. There’s always improvements that can be made as a website develops, and we’re excited to share what we’re learning with the wider industry. Our end users don’t have a say in how much energy a website produces, so it’s up to agencies to lead the way!”

– Neil Clark, Environmental Lead, Manifesto


Driving climate action with a sustainable web build for the Climate Group

Everything we use holds the potential to be more sustainable, including websites. The Climate Group wanted to bring their three websites together under their new brand identity such that it also reflected their strategic direction, and supported their core mission to accelerate climate change.

Manifesto put the environment at the heart of the project, but the expertise and insight required to build a website sustainably simply didn’t exist when we started. So Manifesto created a series of educational articles for agency peers. Because ultimately, the end user doesn’t have a say in how much impact a website has on the environment. So we need to lead the way.



Despite projecting a 60% decrease in carbon emissions from The Climate Group’s website, Manifesto’s team managed to cut closer to 80% of emissions through a series of innovative technology and design solutions. Cutting down page weights by 50% which, in turn, halved the average page load time, increasing the website’s overall SEO and security rankings. As a result, more than 200 of the UK’s trees can focus on emissions elsewhere for the next year.


Takes a simple task of integrating 3 websites into a climate change solution. This could become a new methodology for digital design.
Catriona Campbell, CEO, EY Innovations Lab

Get to know Manifesto

Manifesto is a multi-award winning, agile agency of creatives, coaches, strategists and technologists who collaborate with exceptional organisations to help them own their future.

By listening carefully to the needs of their clients and their audiences, and by developing a shared understanding of how to create value, Manifesto delivers innovative, audience-centred experiences, products, services and change.

Team involved

Neil Clark – Environmental Lead
Paul Pete – Project Manager
Paul Moloney – Drupal Developer
Andrew Dickens – Front End Developer
James Clegg – Designer

Website: https://manifesto.co.uk/