【#Tech24H】On November 9, the Planetary Health Axis System (PHAS) was unveiled. Developed by Peking University in collaboration with dozens of top research institutions worldwide, the system systematically tracks the ecological footprint of human activities and assesses risks related to planetary boundaries. Based on four axes—"Human Health," "Species Health," "Environmental Health," and "Social Health"—it integrates natural sciences, social sciences, systems science, and AI technologies to monitor complex dynamics involving over 48,000 variables under current development conditions.