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What is the present level of carbon dioxide in atmosphere?

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Earth's CO2 Home Page. Atmospheric CO2. February 2018. 408.35 parts per million (ppm). Mauna Loa Observatory, Hawaii (NOAA ESRL). read more

The global concentration of carbon dioxide in the atmosphere – the primary driver of recent climate change – has reached 400 parts per million (ppm) for the first time in recorded history. read more

The graph shows recent monthly mean carbon dioxide measured at Mauna Loa Observatory, Hawaii. The last four complete years of the Mauna Loa CO 2 record plus the current year are shown. Data are reported as a dry air mole fraction defined as the number of molecules of carbon dioxide divided by the number of all molecules in air, including CO 2 itself, after water vapor has been removed. read more

The present level of atmospheric carbon dioxide is approximately 380 parts per million and rising rapidly due to human activities such as burning fossil fuels, deforestation and cement manufacture. read more

Video: The ocean's important role in absorbing heat and carbon dioxide from the atmosphere. Video: Ocean circulation plays an important role in absorbing carbon from the atmosphere Video: The expanse of the annual minimum Arctic sea ice for each year from 1979 through 2016. read more

Carbon dioxide in the Earth's atmosphere is essential to life and to the present planetary biosphere. Over the course of Earth's geologic history CO 2 concentrations have played a role in biological evolution. read more

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