#69 Big Tech carbon emissions by the millions with Cathleen Berger
November 18, 2025
They say that numbers don’t lie… but what if we are looking at the wrong numbers to begin with?
On today’s episode of Green IO, Gaël is joined by Cathleen Berger who is here to help us decipher why accurate emissions reporting is so crucial, and why Big Tech continues to make big mistakes when it comes to the figures they release.
Because as the former Head of Sustainability at Mozilla, a lecturer at the Friedrich Schiller University and the head of research and policy for the Deputy Chair on the Digital Committee of the German parliament it’s safe to say that Cathleen knows a thing or two about why accurate data matters.
They say that numbers don’t lie… but what if we are looking at the wrong numbers to begin with?
On today’s episode of Green IO, Gaël is joined by Cathleen Berger who is here to help us decipher why accurate emissions reporting is so crucial, and why Big Tech continues to make big mistakes when it comes to the figures they release.
Because as the former Head of Sustainability at Mozilla, a lecturer at the Friedrich Schiller University and the head of research and policy for the Deputy Chair on the Digital Committee of the German parliament it’s safe to say that Cathleen knows a thing or two about why accurate data matters.
During this conversation, Gaël and Cathleen also talk about:
On today’s episode of Green IO, Gaël is joined by Cathleen Berger who is here to help us decipher why accurate emissions reporting is so crucial, and why Big Tech continues to make big mistakes when it comes to the figures they release.
Because as the former Head of Sustainability at Mozilla, a lecturer at the Friedrich Schiller University and the head of research and policy for the Deputy Chair on the Digital Committee of the German parliament it’s safe to say that Cathleen knows a thing or two about why accurate data matters.
During this conversation, Gaël and Cathleen also talk about:
- Why Big Tech might not want to disclose everything
- What the numbers say (and what they’re hiding)
- Is anyone seriously following the GHG protocol
- Present-day issues with emissions disclosures
- Techniques used to conceal important info
- Who’s doing things right (and who’s not)
And much, much more.
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❤️ Like and subscribe so that you never miss an episode.
📧 Each month our readers get carefully curated news on digital sustainability, packed with exclusive Green IO content. Subscribe to the Green IO newsletter: https://newsletter.greenio.tech
📣 Green IO next Conference is in Paris on December 9 - 11: https://greenio.tech/conference/17/paris-2025-december
Every Green IO listener can get a free ticket using the voucher GREENIOVIP. A small gift for your huge support. 🎁
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Connect with Cathleen Berger:
- Cathleen Berger
- https://www.linkedin.com/in/cathleen-berger-berlin/
- Cathleen Berger (@cberger.bsky.social)
- https://cathleenberger.medium.com
Connect with Gaël and Green IO:
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https://greenio-podcast.slack.com
Green IO https://www.gaelduez.com
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Green IO https://www.gaelduez.com
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Referenced in this episode:
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https://greenio.tech/blog/
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