Now, most of the market inside private ventures oftenly choose carbon offsets, but even this type of choice usually warrants a mandatory governmental overwatch in the form of carbon or CO2 allowances (CO2 allowances - a term that shall be used in this WP to define carbon allowances as a whole to avoid any confusion between the terms carbon offset and carbon allowance). In the case of the EU, the mandated form of carbon allowance or CO2 allowance is the so-called European Union Allowance (EUA). For further information, on how different markets around the globe choose what particular form of mandated certification system, see the ‘Market’ section inside this white paper.