Mike Schroepfer, former CTO of Meta, left his role in 2021 to focus on combating climate change through both philanthropic and for-profit initiatives, including founding Gigascale Capital and launching Carbon to Sea. He wants to use technology to provide scalable solutions, such as enhanced ocean alkalinity, solar geoengineering, and glacier stabilization. Schroepfer aims to build proof-of-concept models to demonstrate viable climate solutions.