PPCDAM

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...

A protocol is always linked to an existing convention but is a separate and additional agreement that must be signed and ratified by the "signatory" parties to the convention. Protocols strengthen a convention, usually by adding new and more detailed commitments.

After signing an international treaty, such as the Climate Change Convention or the Kyoto Protocol, a country has to ratify the commitment, often with the approval of its parliament or other legislature. The ratification instrument must be deposited with the UN...