Scientists estimate that before the industrial revolution in 1750, carbon dioxide levels measured about 280 ppmv. Figure 12: Atmospheric Concentrations of Carbon Dioxide Measured at Mauna Loa, Hawaii, 1958-1995 Atmospheric concentrations of carbon dioxide have steadily increased in the past 40 years.
(Figure 12; Measured; at Mauna Loa) (Scientists; estimate; that before the industrial revolution in 1750, carbon dioxide levels measured about 280 ppmv) Context(Scientists estimate,List([0, 19))):(carbon dioxide levels; measured; about 280 ppmv; T:before the industrial revolution in 1750) Context(Scientists estimate,List([0, 19))):(Atmospheric Concentrations of Carbon Dioxide; have steadily increased; T:in the past 40 years)
Scientists estimate,List([0, 19)) Scientists estimate,List([0, 19))
Figure 12 Scientists carbon dioxide levels Atmospheric Concentrations of Carbon Dioxide
Measured estimate measured have steadily increased
at Mauna Loa
that before the industrial revolution in 1750, carbon dioxide levels measured about 280 ppmv
about 280 ppmv T:before the industrial revolution in 1750
T:in the past 40 years