On this day in ...
... 2002, Iceland ratified the Kyoto Protocol, thus satisfying a key prerequisite to entry into force of that 1998 pact; that is, ratification by at least 55 states party to the 1992 U.N. Framework Convention on Climate Change. A 2d step would be met with Russia's ratification 2 years later, so that the Protocol would enter into force on February 16, 2005. As detailed in posts available here, Kyoto's since ceded ground to the Copenhagen process.
(Prior May 23 posts are here, here, and here.)