Geoengineering Risks and Climate Action: A Climatologist's Perspective

Geoengineering: A Risky Proposition

• 💡 Geoengineering, specifically solar radiation modification, involves spraying aerosols into the stratosphere to cool the planet.
• ⚠️ This method is highly worrying due to unknown consequences, potential rebound effects upon cessation, and uncontrolled impacts on precipitation and plant photosynthesis.
• 💰 The concern is amplified by the financial power of both public and private actors who could implement these schemes unilaterally.
• 🔬 While removing greenhouse gases is necessary, solar radiation management is not a true solution as it doesn't address ocean acidification.

Progress and Setbacks in Climate Negotiations

• 📈 Since the Paris Agreement, global temperature projections have improved from 3-4 degrees Celsius warming to 2.6-2.8 degrees Celsius, indicating that progress is possible.
• 📉 However, the political climate has shifted negatively, impacting negotiations and investment in transition technologies, particularly influenced by changes in US policy.
• 🗣️ Despite concerns about "hot air" and pledges, the energy transition is underway with renewable energies becoming cheaper and more prevalent.

Pathways to Climate Solutions

• ⚡ The primary way forward involves a transition from fossil fuels to cleaner technologies and increased electrification.
• 📉 Crucially, there's also a need for reduction in overall energy consumption, particularly in transport and daily habits.
• 🌍 Climate change is an additional layer of complexity on top of existing global conflicts and injustices, requiring a holistic approach to address all issues concurrently.

The Amazon and Carbon Markets

• 🌳 The Amazon, though less effective due to rising temperatures, still removes CO2 from the atmosphere; deforestation is the primary driver of greenhouse gas emissions in the region.
• 💰 The effectiveness of turning the environment into a monetary system through carbon markets is questionable, with past experiments like the Kyoto Protocol showing limited success.