On Saturday, October 24, nearly 200 whitewater and sea kayaks, stand up paddle boards, and canoes converged on the Willamette River in Portland, Oregon to form a giant floating 350 as part of the largest global day of climate action ever. Paddlers in this River of Action event joined more than 5,200 rallies in more than 180 nations to urge world leaders to take fast and effective action on global warming, to bring attention to the number 350. Scientists have insisted in recent years that 350 parts per million is the most carbon dioxide (CO2) we can safely have in the atmosphere. The current CO2 concentration is 390 parts per million.
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