Episode #30: Capital, climate and the next economic transition with Nina Siemiatkowski

In this episode of Sustainable Edge

Host Joachim Nahem, Executive Chairman and Co-Founder at Position Green, sits down with Nina Siemiatkowski, co-founder and CEO of Milkywire, entrepreneur, investor, and co-founder of Flat Capital.

Nina’s journey is anything but conventional. After a successful corporate career, she became a wildlife photographer, spending years documenting ecosystems and biodiversity in Africa. Those experiences exposed her to the realities of biodiversity loss and climate change and ultimately inspired her to build Milkywire, a company dedicated to helping organisations fund high impact climate and nature solutions.

Today, Nina operates at the intersection of sustainability, entrepreneurship, and technology. Through Milkywire, she helps companies navigate climate and nature investments, while through Flat Capital she invests in some of the world’s most influential technology companies, including OpenAI and SpaceX. Her unique perspective offers valuable insights into how capital, innovation, and long term thinking can help drive the next phase of the sustainability transition.

Nina Siemiatkowski shares her perspective on the future of climate action, carbon markets, nature restoration, and entrepreneurship. She explains why sustainability remains a long term economic opportunity despite shifting political priorities and changing market sentiment.

Learn about

• Capital as a catalyst for climate action
  Why funding climate and nature solutions remains one of the biggest untapped opportunities for businesses and investors.
• The future of carbon removal
  How durable carbon removal is evolving from a niche market into an essential component of credible net zero strategies.
• Beyond emissions reductions
  Why businesses need to think not only about reducing emissions, but also about restoring nature and supporting climate solutions.
• Scaling climate solutions like technology companies
  What climate entrepreneurs can learn from the growth journeys of successful technology businesses.
• The risks of premature scaling
  Why many founders overestimate market readiness and how to balance ambition with discipline.
• Profit and impact go hand in hand
  Why long term impact requires financially sustainable business models.
• Climate, AI, and the battle for capital
  What today’s investment trends reveal about conviction, innovation, and future market opportunities.
• Reasons for optimism
  Why Nina believes the sustainability transition is continuing, even if it is happening more quietly than before.

About Nina Siemiatkowski

Nina Siemiatkowski is the co-founder and CEO of Milkywire, an impact firm helping companies design and manage programs that support climate and nature goals. Milkywire works with leading organisations to fund high quality climate solutions, biodiversity initiatives, and carbon removal projects around the world.

Nina is also the co-founder of Flat Capital, a publicly listed investment company that invests in frontier technology companies including OpenAI and SpaceX. Having also witnessed the growth of Klarna from close range, she brings a rare combination of experience across entrepreneurship, investing, technology, and sustainability.

A passionate advocate for climate and nature, Nina continues to explore how capital can be directed toward solving some of the world’s most pressing environmental challenges.

Why it matters

As businesses navigate economic uncertainty, geopolitical tensions, and rapid technological change, sustainability can sometimes feel less urgent than it did just a few years ago. Yet climate change, biodiversity loss, and resource constraints continue to shape the long term outlook for economies and markets.

Nina argues that the next phase of the transition will be defined not by promises, but by execution. Companies, investors, and entrepreneurs that understand how to combine innovation, capital, and long term thinking will be best positioned to create value while contributing to a more resilient future.

Resources

Milkywire Whitepaper: Operational Net Zero