Gas naturally present in the atmosphere, accounting for approximately 0.036% of all of the atmospheric gases, and also emitted from the burning of fossil fuels and biomass, land use changes, and other industrial processes. It is one of the main greenhouse gases and is used as a reference to the other ones.
Veja também
See also
CDM Project Activities
CDM Project Activities
Activities that are part of a candidate CDM project and that provide a reduction in the emission of greenhouse gases or an increase in the removal of CO2. (see question 20 of the ABC of Changes)