claim: Without human intervention, the concentration of CO2 has climbed as high as 7,000 parts per million (ppm) in prior eras, whereas at present the concentration is just over 400 ppm.
evidences.evidence_id: Carbon dioxide in Earth's atmosphere:7
evidences.article: Carbon dioxide in Earth's atmosphere
evidences.evidence: Global annual mean CO 2 concentration has increased by more than 45% since the start of the Industrial Revolution, from 280 ppm during the 10,000 years up to the mid-18th century to 415 ppm as of May 2019.
evidences.votes: SUPPORTS SUPPORTS
evidences.evidence_id: Carbon dioxide:177
evidences.article: Carbon dioxide
evidences.evidence: Carbon dioxide in Earth's atmosphere is a trace gas, currently (mid 2018) having a global average concentration of 409 parts per million by volume (or 622 parts per million by mass).
evidences.votes: SUPPORTS SUPPORTS
evidences.evidence_id: Carbon dioxide:3
evidences.article: Carbon dioxide
evidences.evidence: The current concentration is about 0.04% (410 ppm) by volume, having risen from pre-industrial levels of 280 ppm.
evidences.votes: SUPPORTS SUPPORTS
evidences.evidence_id: Greenhouse gas:127
evidences.article: Greenhouse gas
evidences.evidence: Measured atmospheric concentrations of carbon dioxide are currently 100 ppm higher than pre-industrial levels.
evidences.votes: NOT_ENOUGH_INFO REFUTES
evidences.evidence_id: Greenhouse gas:5
evidences.article: Greenhouse gas
evidences.evidence: Human activities since the beginning of the Industrial Revolution (around 1750) have produced a 45% increase in the atmospheric concentration of carbon dioxide, from 280 ppm in 1750 to 415 ppm in 2019.
evidences.votes: SUPPORTS SUPPORTS