Pre-Industrial CO2 Levels

1851-1859_Pre-Industrial CO2 LevelsPre-industrial concentration of atmospheric CO2 is 280 ppm and ocean pH is 8.21. Scientists study pre-industrial levels of CO2 in order to measure the degree of impact humans have had on the environment. While there is a high degree of variance over time, historic CO2 concentrations provide a baseline to compare current trends to, allowing scientist to make more accurate assessments of anthropogenic climate change.

World Population : 170,060,000

Key:   1,000,000 People    1,000,000 People (Annotated)    Milestone

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