How tech groundbreaker Greg Smithies went from Elon Musk’s inner circle to tackling real estate’s $18 trillion carbon-emissions problem

• Greg Smithies leads the biggest fund focused on the decarbonization of real estate.
• Smithies has worked on sustainability issues and with Elon Musk’s The Boring Company.
• He said decarbonization is beginning to make good financial sense, which will drive progress.

Greg Smithies, the co-head of the world’s largest real-estate-tech climate fund at Fifth Wall, has $500 million at the ready for one monumental task: decarbonizing buildings, the largest single source of carbon emissions in the world.