Key Takeaways from the Nine Planetary Boundaries

•   There are nine planetary boundaries, each representing a critical Earth system process.
   
• Climate change and biosphere integrity are core boundaries that support overall planetary stability.
   
• Boundaries are connected, exceeding one can increase stress on others.
   
• Not all boundaries are equally well understood, but uncertainty does not eliminate risk.
   
• The goal is not to eliminate human activity, but to stay within safe ecological limits.