On May 9, 2013, an instrument near the summit of Mauna Loa in Hawai'i, United States, recorded a long-awaited climate milestone: the amount of carbon dioxide (CO2)in the atmosphere there had exceeded 400 parts per million (ppm) for the first time in 55 years of measurement—and probably more than thre million years of ...
Oct 19, 2023
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Jul 13, 2014 · The annual average concentration of carbon dioxide (CO2) in the atmosphere stood at 395.3 parts per million (ppm) in 2013—a 27 percent ...
How the World Passed a Carbon Threshold and Why It Matters
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Jan 26, 2017 · Last year marked the first time in several million years that atmospheric concentrations of CO2 passed 400 parts per million.
May 21, 2013 · The global concentration of carbon dioxide in the atmosphere – the primary driver of recent climate change – has reached 400 parts per million ( ...
Jul 16, 2013 · On May 9, 2013, CO2 levels in the air reached the level of 400 parts per million (ppm). ... The level of CO2 in the atmosphere has risen from ...
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, ...
Oct 19, 2023 · Many scientists argue that the CO2 concentration must be stopped at 450 ppm to avoid the worst effects of climate change. Some activists argue ...
May 6, 2015 · CO2 emissions are the main driver of climate change and have risen more than 120 ppm since pre-industrial times. The planet has warmed 1.6°F ...
Carbon taxes and nuclear power will be necessary to cut CO2 emissions quickly enough to avert disastrous climate change, they say. John Rennie. Next. Expand ...
May 14, 2019 · The level of CO2 in the atmosphere has risen an average of 2.5 ppm per year over the past decade, reaching 400 ppm in 2013 — and the level ...
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