Hardware to Save a Planet

Reinventing Cement: The Breakthrough That Could Cut 8% of Global Emissions with Greg Williams


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In this episode of Hardware to Save a Planet, host Dylan Garrett talks with Greg Williams, VP of Product at Sublime Systems, about their groundbreaking low-carbon cement. They discuss how Sublime’s electrochemical process eliminates fossil fuel kilns and limestone-derived emissions, tackling 8% of global CO2 output. Greg shares insights on scaling their technology, industry partnerships, and the path to making sustainable cement the new standard.

What you’ll learn:
  • Greg's Journey to Decarbonizing Cement
  • The Basics of the Cement vs. Concrete Debate
  • Why Cement Production is So Emissions-Heavy
  • How Sublime's Solution Decarbonizes Cement Production
  • More about the Scaling Journey From Pilot Plant to Commercial Production
  • The Value of Strategic Partnerships: Collaborating with Industry Leaders
  • The Book & Claim Model and How Microsoft is Supporting Green Cement


Greg Williams is the VP of Product at Sublime Systems and an accomplished product leader with over 15 years of experience driving hardware and software innovation across startups and public companies. Now focused on climate solutions, he brings a multidisciplinary approach to problem-solving, rapid learning, and clear communication. Greg excels at identifying market opportunities, as demonstrated in his leadership at a robotics AI startup, where he spearheaded a strategic pivot that led to a successful acquisition. Passionate about mentoring and impact-driven innovation, he is dedicated to developing technologies that address the climate crisis.


Episode Resource
  • Greg Williams on LinkedIn
  • Sublime Systems Website
  • Sublime Systems Project Image
  • Dylan Garrett on LinkedIn
  • Synapse Website
  • Hardware to Save a Planet Apple Podcasts
  • Hardware to Save a Planet Spotify

Hardware to Save a Planet is handcrafted by our friends over at: fame.so

If you are interested in sponsoring Hardware to Save a Planet, please see our sponsorship offer here.

Previous guests include: Peter Reinhardt of Charm Industrial, Carlos Araque of Quaise, Noah McQueen of Heirloom, Areeb Malik of Glacier, Jeff Satwicz of Bigbelly, Abe Schneider of Natel Energy, Insiya Jafferjee of Shellworks, Paul Gross of Remora, Erika Boeing of Accelerate Wind and Daniel Betts of Blue Frontier.

Check out our three most downloaded episodes:

  • Going Big on Clean Energy with Small Fusion Reactors with Robin Langtry, Co-Founder and CEO of Avalanche Energy
  • The Role of Energy Storage Systems in Combating Climate Change with Mike Wietecki of Powin and John Thomas of ESS
  • Marine Electrification to Reduce Costs and Environmental Damage: A Conversation with Marcelino Alvarez, CEO of Photon Marine

If you have an interesting hardware solution to the climate crisis and would like the opportunity to share this with our audience, please complete this Guest Application form: https://fame.so/syn
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