When man first walked on the moon, the carbon dioxide concentration in Earth's atmosphere was 325 parts per million (ppm). By 9/11, it was 369 ppm, and when COVID-19 shut down normal life in 2020, it ...
An observatory high on Hawaii's Mauna Loa volcano that measures carbon dioxide in the atmosphere has reported its highest ever seasonal peak concentration of the greenhouse gas. For the first time, ...
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