Record-breaking CO2 Concentrations

Mauna Loa, Hawaii

1958-co2-monitoring-in-hawaii.jpgAtmospheric levels of global CO2 exceed 400 ppm at the Mauna Loa recording station, making it the highest greenhouse gas concentrations in 800,000 to 15 million years.

World Population : 170,060,000

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

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