'mauna loa has been producing a readout which supports manning's predetermined goal by showing steady growth in atmospheric co2 concentrations since 1959.
'mauna loa has been producing a readout which supports manning's predetermined goal by showing steady growth in atmospheric co2 concentrations since 1959.
greenhouse effect:52
measurements of co 2 from the mauna loa observatory show that concentrations have increased from about 313 parts per million (ppm) in 1960, passing the 400 ppm milestone on may 9, 2013.