Glossary beginning with C

Click one of the letters above to go to the page of all terms beginning with that letter.
Carbon footprint

term expressing the total greenhouse gas (GHG) emissions, in CO2 equivalents, of a product, service or organization.


transport under sustainable mobility by which private vehicles are shared by a group of people taking the same route.

CNG (Compressed Natural Gas)

natural gas, composed mainly of methane, compressed and stored in special containers at high pressure. Used as a fuel for vehicles able to run on natural gas.

CO2 eq (carbon dioxide equivalent)

parameter used to compare various greenhouse gas emissions according to their Global Warming Potential (GWP). The CO2 equivalent of a gas is calculated by multiplying the total weight of gas by its corresponding GWP.

COD (Chemical Oxygen Demand)

expressed in milligrams per liter (mg/l), COD is the quantity of oxygen required for the complete chemical oxidation of organic and inorganic compounds present in a sample of water.

Conflict minerals

minerals mined in conditions of armed conflict and human rights abuses, notably in the Democratic Republic of Congo and neighboring states. Their use in the USA is regulated by the Dodd-Frank Act.


a worn component that can be remanufactured.