We talked about:

• Cluelessness
• Space garbage
• Food and climate change
• GHG emission sources
• "Electrification is efficiency: The world will need less energy after the transition" by Hannah Ritchie
• The environmental impacts of refrigerants 
• The podcast episode "Hannah Ritchie on why it makes sense to be optimistic about the environment"
• "The techno-optimist's fallacy" by Matthew Yglesias