Skip to content


Advocate & influence

CAT Mini Grants

The CAT Mini Grant program directs financial support to promising member initiatives that will advance climate advocacy and benefit of the community. Learn more about the project, eligibility and how to apply here.

Community networking


Looking to meet some fellow climate-conscious technologists? Join us in our #cat-roulette Slack channel to get paired up with a randomly selected CAT every two weeks.

Advocate & influence

Branch Magazine

An online magazine written by and for people who dream of a sustainable and just internet. Edited and funded by the Green Web Foundation on behalf of CAT. Call for contributions for issue 8, spring 2024 is open until Tues 27th Feb 2024! Issue 8 open call.

Community learning Green your craft

Watch parties

CAT members get together on a regular basis to watch or listen to talks, podcasts, and other content suggested by the community.

Community learning Green your craft

Knowledge Management & Information Sharing

We’re using Outline to collect information and publishing Action Guides and blog posts to help others take action. Please see #announcements for updates. If you’re part of our Slack community, you can log in with your details and view Outline here.

Past Projects

Community learning Green your craft

CAT Coffee

A regular, open event to mingle, share ideas, discuss things or just meet other CAT members. The topics we discuss vary at every event. Find notes and links from previous CAT Coffee’s on Outline.

Green your craft

CAT Salon

Informal discussion-based events to learn about a climate topic and share experiences and potential actions to take. View presentations on YouTube.

Green your craft

Climate Justice Squads and events

In collaboration with Work on Climate volunteers our Climate Justice Squads were small, themed groups that met over multiple weeks on the topic of Climate Justice. Check out our #climate-justice channel or view event recordings on YouTube.

#LetsGreenTheWeb Together

Advocate & influence Speak up

#LetsGreenTheWeb campaign

The #LetsGreenTheWeb campaign is a focused, 5 day Twitter campaign to encourage and support everyone to measure the carbon emissions of websites and share tweets highlighting the results. Find out more.

Speak up


Every Friday at 11am, colleagues meet for 11 minutes to talk about climate and to show solidarity with the youth climate strikes. Join in: #11at11ClimateStrike on Twitter.

Advocate & influence

The tech industry can be both a cause of climate change and a solution. How do we transition our sector to be more sustainable and, at the same time, help transition the world to be more sustainable? Watch now.

Advocate & influence Speak up

Digital Climate Strike

CAT members contributed to the digital ‘green out’ campaign for businesses to show solidarity with the Youth Global Climate Strike. Over 10,000 websites joined, generating 38% of traffic to the Global Climate Strike website, and 30K+ additional signups [source].