Podcast S2
Podcast S2: Tim Sperry, Carbon Limit
Tim Sperry, Founder of Carbon Limit, is on a mission to remove carbon from the atmosphere by changing something so foundational we rarely think about it: concrete.
Date
11/11/2025
Author
Team Coeus
Tim Sperry isn’t just thinking about climate change, he is redesigning the materials our world is built with. His technology literally turns buildings, roads, and cities into carbon-capturing infrastructure.
If successful, the future skyline will not just represent progress. It will clean the air.
In this conversation, Tim breaks down how carbon credits actually work, how startups can use and sell them, why construction is both one of the world’s biggest polluters and one of its biggest opportunities, and how his product CoolCrete is changing the equation. We talk about the Roman Empire, government grants, the future of climate tech in the Middle East, and what he would do to protect Miami’s coastline.
Tim shows that climate innovation is not about slogans. It is about engineering, policy, and relentless belief in a solution no one else sees yet.
Timestamps:
0:00 Intro
0:50 What Are Carbon Credits
9:43 How Startups Can Use & Sell Credits
19:04 The Use of Carbon Credits in Construction: A Conundrum
25:52 How Tim Got Involved in This Space
35:49 Advice for Founders Seeking Government & Military Grants
44:39 The Need for CoolCrete
52:56 The Roman Empire’s Concrete & Its Lasting Impact
1:03:54 The Future of Cities & Tim’s Work in the Middle East
1:11:00 This or That
1:19:29 How Tim Would Protect Miami’s Coast If He Was In Charge
1:33:59 Effects of the Inflation Reduction Act & the Potential US Public Investment Fund
1:41:12 Final Lessons & Advice
1:44:58 Shout-Outs & Plugs