The Mount Everest massif and Barun Valley is a first opportunity—“highest place on Earth for the highest priority.” As a monitoring method, technologies, and partnerships are perfected, other biomeridians will be added: A biomeridian in Africa, spanning similarly from the tropics to the arctic. Exactly which mountain slope should be chosen has not been determined. Very likely it will be in the Ruwenzori Mountains or Mount Kilimanjaro. The concept of biomeridian was discovered two centuries ago by Alexander von Humboldt on the Chimborazo volcano in South America. (More complete description below.) Now a permanent monitoring station will be set up on Chimborazo, and like Everest also a transect with wet/dry parallel options. Mauna Loa in Hawaii will be a fourth biomeridian that runs from snow-clad summits to the tropics—attractive also because this Earth’s longest monitoring of CO2 levels and because this mountain transect extends to 20,000 feet deep in the Pacific Ocean.