How Marlon Brando’s private island inspired a plan to suck carbon pollution from the air

illuminem summarises for you the essential news of the day, reviewed by our editorial team. Read the full piece on CNN or enjoy below:

🗞️ Driving the news: A research project inspired by coral reefs on Marlon Brando’s former private island has led to a novel carbon removal technology
• Seattle-based Banyu Carbon is testing a sunlight-powered system in Western Australia that uses light-sensitive dye molecules, known as photoacids, to capture carbon dioxide from the air and release it for storage or industrial use

🔭 The context: Developed from research into ocean acidification, the process exposes a water-based dye solution to air, allowing it to absorb CO₂
• Sunlight then triggers the dye to release the captured carbon, without the energy-intensive heating required by many conventional direct air capture systems
• The demonstration unit can remove just one tonne annually, with the company targeting facilities capable of capturing around 500,000 tonnes a year by the early 2030s, at a projected cost of $200 per tonne
• However, financing and demand remain major obstacles for the wider carbon removal industry

🌍 Why it matters for the planet: Carbon removal could help address emissions already accumulated in the atmosphere, but novel technologies remain far from operating at the scale required
• The sector must also avoid becoming a substitute for cutting fossil fuel emissions
• Banyu's founders acknowledge that preventing CO₂ emissions in the first place remains the cheapest and most effective approach

⏭️ What’s next: The Australian demonstration will test whether the technology can move towards commercial deployment
• Banyu has raised $8.5 million and secured buyers including H&M and Shopify through a $500,000 pre-purchase contract
• Its longer-term prospects would depend on proving performance, lowering costs and establishing reliable demand for carbon removal

💬 One quote:  “The lowest energy, best for the planet, cheapest carbon removal is not putting carbon dioxide in the atmosphere in the first place, right?” - Alex Gagnon, Banyu Carbon co-founder 

📈 One stat: Banyu's demonstration unit is designed to remove one tonne of CO₂ over 12 months. The company hopes future facilities could capture around 500,000 tonnes annually

Subscribe to our free newsletters to never miss a beat in sustainability.

The world needs sustainability knowledge. At illuminem, no interest group or shareholder can influence our work. Thank you for supporting our mission to make high-quality and independent sustainability information free for all. Every contribution helps. Thank you for donating today.