Greenhouse gas concentrations surge to new record | World Meteorological Organization

The last time the Earth experienced a comparable concentration of CO2  was 3-5 million years ago, the temperature was 2-3°C warmer and sea level was 10-20 meters higher than now.

Population growth, intensified agricultural practices, increases in land use and deforestation, industrialization and associated energy use from fossil fuel sources have all contributed to increases in concentrations of greenhouse gases in the atmosphere since the industrial era, beginning in 1750.

Source: Greenhouse gas concentrations surge to new record | World Meteorological Organization

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