How much carbon is contained in Earth?
How much carbon is emitted from active volcanoes and active tectonic areas?
How is carbon recycled between the atmosphere and Earth’s crust, mantle, and core?
What are the chemical forms of carbon in deep Earth, and how are they distributed?
What is the nature of the whole Earth carbon cycle and how has it changed over Earth’s history?
DECADE (Deep Earth Carbon Degassing)
DMGC (Diamonds and Mantle Geodynamics of Carbon)
Image credits. Volcanoes: Poás Volcano, Tobias Fischer; Superdeep diamonds from Brazil, Michael Walter; Degassing: Isluga Volcano, Trail By Fire.