Sun, solar radiation, atmosphere, planet earth, winds, rains, oceans, rivers, earth's heat, geotectonics, earthquakes, volcanoes, denudation, space encounters.
Adenosine triphosphate, archaea and bacteria, photosynthesis, C3 and C4 plants, phytoplankton, forests, grasslands, heterotrophic metabolism, reproduction, growth, endotherms and ectotherms, food chains, herbivores, carnivores, swimming, running and jumping, flying.
Basal metabolism, thermoregulation, pregnancy and lactation, human growth, walking and running, labor and leisure, nutrients, grains, bread, lipids and meat, milk, ethanol.
4. Preindustrial societies.
Hunters and gatherers, shifting cultivation, traditional agricultures, cattle, horses, wood, charcoal, and straw, waterwheels, windmills, copper, iron, and steel, gunpowder, sailships.
5. Fossil-fueled civilization.
Fossil fuels and electricity, coals, crude oils, natural gases, steam engines, steam turbines, water turbines, fission reactors, transmission, electric motors, lights, internal combustion engines, gas turbines, blast furnaces, aluminum, nitrogen, nuclear weapons.
6. Transporation and information.
Trains, ships, bicycles, cars, airplanes, rockets, pipelines, tankers, telephones, radio and television, computers and microchips.
