This COP29 episode is a chat with Peter Castellas, chief executive of Climate Zeitgeist.

Peter founded Climate Zeitgeist to catalyse investment in business solutions that address climate change. Its activities include the annual Climate Investor Forum, which connects investors and climate change solutions providers.

Peter talks about the COP, with a strong focus on progress being made on rules for carbon markets, which are a key instrument that enables climate change cooperation between countries and companies. 

These rules are being established under what's known as Article 6 of the Paris Agreement. Article 6 comprises two parts. Article 6.2 provides for market-based exchanges of emissions abatement between countries. And article 6.4 provides for a UN-administered carbon market. 

Explore related Track Changes episodes:

• COP29: A surprise, a superfan, and Singapore (reflections on COP from Evan Stamatiou of Climate Risk Management, Emily Gerrard of Comhar Group, and Mark Tilly of Carbon Pulse). 
• COP29 mix-tape - the COP from 'A' to 'J' (conference vox pops from the delegates pavilion).
• Richie Merzian - from climate negotiator to clean energy advocate.
• Leaders of today and tomorrow (Three speakers at the leaders segment that kicked off the COP - UN Secretary-General Antonio Guterres, the UN's chief  climate scientist Jim Skea, and the Prime Minister of Barbados, Mia Mottley - followed by two leaders of tomorrow - Toni Kemel Soalablai and Charlie Bevis - who are both involved in the Youth Negotiators Academy.
• COP29: Damaged but not lost - an interview with WWF's Kesaya Baba, and Mark Tilly of Carbon Pulse.