Food Storage If you needed to store a calorie crop such as rice, you would need to store a little over 370 pounds. Human Daily Needs and Effluents Reference: NASA RP-1324, "Designing for Human Presence in Space: An Introduction to Environmental Control and Life Support Systems", Paul O. Wieland, 1994, Marshall Space Flight Center, Huntsville, Alabama. Also see NASA-STD-3000, Man Systems Integration Standards, Figure 5.8.2.2.5-1, page 5-120. 1.57 0.71  H2O , Respiration and 5.02 2.28 Fuel energy content per pound: Gasoline around 18,000 BTU Coal around 10,000 BTU Wood around 5,000 BTU THE EARTH , Pb