claim: Each of the six major past ice ages began when the atmospheric carbon dioxide content was far higher than at present.
evidences.evidence_id: 2012 in science:264
evidences.article: 2012 in science
evidences.evidence: (BBC) 4 April A new, detailed record of past climate change has shown compelling evidence that the last ice age was ended by a rise in temperature driven by an increase in atmospheric carbon dioxide.
evidences.votes: REFUTES REFUTES
evidences.evidence_id: Climate of Mars:89
evidences.article: Climate of Mars
evidences.evidence: Much of this early atmosphere would have consisted of carbon dioxide.
evidences.votes: SUPPORTS NOT_ENOUGH_INFO
evidences.evidence_id: Earth:53
evidences.article: Earth
evidences.evidence: The present pattern of ice ages began about 40 Mya, and then intensified during the Pleistocene about 3 Mya.
evidences.votes: NOT_ENOUGH_INFO NOT_ENOUGH_INFO
evidences.evidence_id: Geologic temperature record:10
evidences.article: Geologic temperature record
evidences.evidence: The gradual intensification of this ice age over the last 3 million years has been associated with declining concentrations of the greenhouse gas carbon dioxide, though it remains unclear if this change is sufficiently large to have caused the changes in temperatures.
evidences.votes: REFUTES REFUTES
evidences.evidence_id: Peat:182
evidences.article: Peat
evidences.evidence: It decomposes and turns into carbon dioxide (CO 2), which is released into the atmosphere.
evidences.votes: NOT_ENOUGH_INFO NOT_ENOUGH_INFO