This book presents artificial photosynthesis (AP) that facilitates the capture and storage of solar energy in order to meet our energy needs. Furthermore, renewable carbon-neutral high-energy-density liquid fuels used in the present existing energy distribution infrastructure can also be synthesized by following the AP process using carbon dioxide, water, and electricity derived from sunlight. The only way to make energy, environment, economy, and life sustainable is to harvest sunlight to meet the energy needs of society by using carbon dioxide and water as for energy storage.