D - Enormous energy requirements
Carbon is a chemical element with symbol C and atomic number 6. On the periodic table, it is the first of six elements in column, which have in common the composition of their outer electron shell. It is nonmetallic and tetravalent.
Carbon moves from living things to the atmosphere. Each time you exhale, you are releasing carbon dioxide gas (CO2) into the atmosphere. Animals and plants need to get rid of carbon dioxide gas through a process called respiration. Carbon moves from fossil fuels to the atmosphere when fuels are burned.
