claim: the concentration of carbon dioxide in Earth’s atmosphere has climbed to a level last seen more than 3 million years ago — before humans even appeared on the rocky ball we call home.
evidences.evidence_id: Carbon dioxide in Earth's atmosphere:15
evidences.article: Carbon dioxide in Earth's atmosphere
evidences.evidence: The daily average concentration of atmospheric CO 2 at Mauna Loa Observatory first exceeded 400 ppm on 10 May 2013 although this concentration had already been reached in the Arctic in June 2012.
evidences.votes: NOT_ENOUGH_INFO NOT_ENOUGH_INFO NOT_ENOUGH_INFO
evidences.evidence_id: Carbon dioxide in Earth's atmosphere:23
evidences.article: Carbon dioxide in Earth's atmosphere
evidences.evidence: The National Geographic wrote that the concentration of carbon dioxide in the atmosphere is this high "for the first time in 55 years of measurement—and probably more than 3 million years of Earth history."
evidences.votes: SUPPORTS SUPPORTS SUPPORTS
evidences.evidence_id: Carbon dioxide in Earth's atmosphere:24
evidences.article: Carbon dioxide in Earth's atmosphere
evidences.evidence: The current concentration may be the highest in the last 20 million years.
evidences.votes: NOT_ENOUGH_INFO SUPPORTS NOT_ENOUGH_INFO
evidences.evidence_id: Carbon dioxide in Earth's atmosphere:50
evidences.article: Carbon dioxide in Earth's atmosphere
evidences.evidence: About 34 million years ago, the time of the Eocene–Oligocene extinction event and when the Antarctic ice sheet started to take its current form, CO 2 was about 760 ppm, and there is geochemical evidence that concentrations were less than 300 ppm by about 20 million years ago.
evidences.votes: NOT_ENOUGH_INFO NOT_ENOUGH_INFO NOT_ENOUGH_INFO
evidences.evidence_id: Carbon dioxide:182
evidences.article: Carbon dioxide
evidences.evidence: Combustion of fossil fuels and deforestation have caused the atmospheric concentration of carbon dioxide to increase by about 43% since the beginning of the age of industrialization.
evidences.votes: NOT_ENOUGH_INFO NOT_ENOUGH_INFO NOT_ENOUGH_INFO