May 30, 2002 - Sixteen EU countries ratify the Kyoto Protocol, pushing it over the 55 required as one condition of going into force. The Protocol contains two conditions:
"on the ninetieth day after the date on which not less than 55 Parties to the Convention, incorporating Parties included in Annex I which accounted in total for at least 55% of the total carbon dioxide emissions for 1990 of the Annex I countries, have deposited their instruments of ratification, acceptance, approval or accession."
With Autria's ratification, the first condition--55 parties--was met. The second condition, 55% of emissions from Annex 1 parties was met later when Russia ratified it on November 18, 2004, bringing it into force 90 days later in February 2005.
This is one in the series of "Decade in Review" posts on this blog that began in January 2010. These posts present climate-change-related events that occurred during the 00's, the warmest decade in recorded history.