http://news.yahoo.com/s/afp/20091024/sc_afp/environmentclimatewarmingaction_20091024193314Kicking off with thousands gathering on the steps of Sydney's iconic Opera House, global warming protests took place around the world Saturday to mark 50 days before the UN climate summit.
From Asia to Europe via the Middle East, activists staged lively events addressing world leaders and to mobilise public opinion around climate issues.
Many waved placards bearing the logo 350, referring to 350 parts per million (ppm) of CO2 in the atmosphere which scientists say must not be exceeded to avoid runaway global warming.
France's politicians received a "wake up" call from several hundred Parisians who chose clocks as their symbol.
Campaign to Reduce Carbon Dioxide Picks a Number
http://www.nytimes.com/2009/10/25/science/earth/25threefifty.html?partner=rss&emc=rssOn Saturday, they tried something new with the goal of prodding countries to get serious about reaching an international climate accord: a synchronized burst of more than 4,300 demonstrations, from the Himalayas to the Great Barrier Reef, all centered on the number 350.
For some prominent climate scientists, that is the upper limit for heat-trapping carbon dioxide in the atmosphere, measured in parts per million. If the gas concentration exceeds that for long, they warn, the world can expect decades of disrupted climate patterns, rising sea levels, drought and famine.
The current concentration of carbon dioxide is 387 parts per million.
Climate activists form the number '350', representing the atmospheric carbon target of a cut to 350 parts per million, on the steps of the Sydney Opera House on October 24, to kick off an international day of protest about global warming. Similar stunts were planned at some 4,000 locations in more than 170 countries across the globe to mark 50 days until world leaders meet in Copenhagen.
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