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What will the atmospheric CO2 concentration be in 2030?

Over the last few centuries, the concentration of carbon dioxide in Earth's atmosphere has risen from approximately 280 parts per million (pre-industrial) to approximately 410 ppm [1]. Atmospheric carbon dioxide is one of the contributing factors driving climate change via the greenhouse effect.

The trend follows a seasonal cycle that reaches its peak in May, and has also risen at an average rate of around 2ppm annually in the last ten years.

What will be the average atmospheric CO2 content observed throughout the year 2030?

The resolution will be based on the globally, annually averaged figure provided by the NOAA Earth System Research Laboratory.

If this organization (or a successor) does not exist or no longer provides this information in 2030, the question should resolve ambiguously.

(See also: Worst-case scenario for global CO2 levels realized over the coming decades?, which asks about a more severe milestone of 500ppm until 2050.)

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