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.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: 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."

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: 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.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: ...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.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Context for the founding of the GCC from 1988 included the establishment of the Intergovernmental Panel on Climate Change (IPCC) and NASA climatologist James Hansen's congressional testimony that climate change was occurring.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: There were increasing heatwaves and drought problems in the summer of 1988, and NASA climate scientist James Hansen's testimony in the U.S. Senate sparked worldwide interest.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: In June 1988, James E. Hansen made one of the first assessments that human-caused warming had already measurably affected global climate.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: James E. Hansen (1941 --), American climatologist

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Public attention was renewed amidst summer droughts and heat waves when James Hansen testified to a Congressional hearing on 23 June 1988, stating with high confidence that long term warming was underway with severe warming likely within the next 50 years, and warning of likely storms and floods.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Revelle, Plass and other scientists alerted media to press for government attention, the dangers of global warming came to the fore at James Hansen's 1988 Congressional testimony.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Retrieved 2010-08-28. the leading international network of climate scientists has concluded for the first time that global warming is 'unequivocal' and that human activity is the main driver, 'very likely' causing most of the rise in temperatures since 1950 Stevens, William K. (2007-02-06).