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400 ppm-ko langa hautsi da: CO2-kontzentrazioaren igoeraren ondorio fisiko eta sozialak
(Basque Centre for Climate Change/Klima Aldaketa Ikergai, 2013-12-20)
The concentration of carbon dioxide (CO2) in the atmosphere has achieved its highest levels in the last 800,000 years, and probably even in the last 2.1 million years, recently topping briefly the atmospheric concentration ...