Figure 1
Three kinds of energy use as a function of body mass.
Black circles are basal metabolic rate for mammals4. Grey circles are field metabolic rate for mammals3 The open blue circles are per capita energy use among industrial human populations36 with a star at the median value. The arrows illustrate the linking of per-capita energy use to a corresponding mass by way of following the regression between metabolic rate and body size for mammals. Body mass for all human populations is set to 50kg.
