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.
Carbon sinks
Any processes, activities or mechanisms, including biomass, and especially forests and oceans, which have the property of removing a greenhouse gas, aerosols or precursors of greenhouse gases from the...