WASHINGTON, DC! GUIDING QUESTIONS! deepcarbon.net! • How much carbon is stored in Earth’s deep interior? • What are the reservoirs of that carbon? • How does carbon move among reservoirs? • Is there a significant carbon flux between Earth’s deep interior and the surface? • What is the nature and extent of deep microbial life? • Did deep biochemistry play a role in life’s origins? • Is there a deep source of hydrocarbons?