Some studies estimate that these carbon-dioxide levels are at their highest point in 4.5 million years. During the Pliocene era, scientists have found, carbon-dioxide levels appeared to be around 415 ppm (which is today). This rise was likely caused by wobbles in the Earth's orbit — and humans weren't around then.
May 7, 2019
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May 16, 2019 · Atmospheric carbon dioxide recently reached 415 parts per million for the first time.
May 13, 2019 · This weekend, sensors in Hawaii recorded Earth's atmospheric concentration of carbon dioxide (CO2) passing 415 parts per million (ppm) for the ...
May 14, 2019 · The level of carbon dioxide in the atmosphere has risen to 415 parts per million — the highest it has been since humans lived on Earth.
May 13, 2019 · Data from the Mauna Loa Observatory in Hawaii showed that carbon dioxide levels reached 415 parts per million on Friday.
Based on the annual report from NOAA's Global Monitoring Lab, global average atmospheric carbon dioxide was 419.3 parts per million (“ppm” for short) in 2023, ...
May 13, 2019 · Scientists in the United States have detected the highest levels of planet-warming carbon dioxide in Earth's atmosphere since records began, ...
May 15, 2019 · On May 12, 2019, carbon dioxide levels in the atmosphere, as measured by instruments on top of Mauna Loa, Hawaii, reached 415 parts per million ...
In 2021, the global average carbon dioxide (CO2) concentration in Earth's atmosphere was about 0.0415% by volume, or 415 parts per million (ppm). Despite ...
