"Author Bill McKibben never saw this coming.

Founder of 350.org, an environmental campaign aimed at holding atmospheric carbon dioxide concentrations below 350 parts-per-million, McKibben set this Saturday as the day to take to the streets.

The call went viral in ways far beyond anything McKibben and fellow organizers imagined: As of Thursday morning some 4,227 actions and rallies are planned in 170 countries, with 300 events in China, 1500 across the United States, 500-plus in Central and South America.

Organizers credit the increasing inter-connectedness of Web, cellular and social networks for the spread, saying such random and organic growth would have been impossible even two years ago."

Douglas Fischer reports for The Daily Climate October 22, 2009. [2]