claim: 'On June 23, 1988, NASA scientist James Hansen testified before the House of Representatives that there was a strong "cause and effect relationship" between observed temperatures and human emissions into the atmosphere.
evidences.evidence_id: James Hansen:171
evidences.article: James Hansen
evidences.evidence: Hansen was invited by Rafe Pomerance to testify before the United States Senate Committee on Energy and Natural Resources on June 23, 1988.
evidences.votes: SUPPORTS REFUTES
evidences.evidence_id: James Hansen:172
evidences.article: James Hansen
evidences.evidence: Hansen testified that "Global warming has reached a level such that we can ascribe with a high degree of confidence a cause and effect relationship between the greenhouse effect and observed warming...It is already happening now" and "The greenhouse effect has been detected and it is changing our climate now...We already reached the point where the greenhouse effect is important."
evidences.votes: SUPPORTS SUPPORTS
evidences.evidence_id: James Hansen:173
evidences.article: James Hansen
evidences.evidence: Hansen said that NASA was 99% confident that the warming was caused by the accumulation of greenhouse gases in the atmosphere and not a random fluctuation.
evidences.votes: SUPPORTS NOT_ENOUGH_INFO
evidences.evidence_id: James Hansen:48
evidences.article: James Hansen
evidences.evidence: During a senate meeting on June 23, 1988, Hansen reported that he was ninety-nine percent certain the earth was warmer then than it had ever been measured to be, there was a clear cause and effect relationship with the greenhouse effect and lastly that due to global warming, the likelihood of freak weather was steadily increasing.
evidences.votes: SUPPORTS SUPPORTS
evidences.evidence_id: James Hansen:639
evidences.article: James Hansen
evidences.evidence: ...Dr. James E. Hansen of the National Aeronautics and Space Administration told a Congressional committee that it was 99 percent certain that the warming trend was not a natural variation but was caused by a buildup of carbon dioxide and other artificial gases in the atmosphere.
evidences.votes: SUPPORTS NOT_ENOUGH_INFO