Introduction Co2+H2O光绿色物(cH2O)+O2(1)Introduction ❑ Strategies for getting energy ➢ Photoautotrophic & Chemoautotrophic: • Make it (e.g. photosynthesis) ➢ Heterotrophic. • Eat it CO２+ H２O 光 绿色植物 (CH２O)＋O２ (1)