Wood, which is made up of atmospheric CO2 and water, consists of 50% cellulose nanofiber (CNF), a nano-level fiber with a diameter of one ten-thousandth the thickness of a human hair. Surprisingly, however, the weight of CNF is one fifth that of steel, although it is 7–8 times stronger. Common paper consists almost entirely of CNF. However, it is not generally well known that wood and paper consist of such strong material because paper tears easily. We are developing light and high-strength or transparent material by producing CNF from pulp for paper and mixing it into plastics. Furthermore, we have made a sports car using CNF material and demonstrated a decrease in weight and CO2 emissions by 16% and 8%, respectively, compared with a conventional car. The CNF material is readily recyclable, and can permanently fix CO2 in the air in a different form unless it is burnt. In this presentation, I will explain how to extract CNF from wood, process it, and construct cars, using video animation.