Claim: "Britain's big freeze is the start of a worldwide trend towards colder weather that seriously challenges global warming theories, eminent scientists claimed yesterday.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: As a consequence of humans emitting greenhouse gases, global surface temperatures have started rising.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: Climate change denialism is the prime example, where a handful of scientists, allied with an effective PR machine, are publicly challenging the scientific consensus that global warming is real and is due primarily to human consumption of fossil fuels.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: The current scientific consensus on climate change is that the Earth underwent global warming throughout the 20th century and continues to warm.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: His findings appeared to contradict global warming — the global temperature had been generally rising since the 70s.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: The consensus theory of the scientific community is that the resulting greenhouse effect is a principal cause of the increase in global warming which has occurred over the same period, and a chief contributor to the accelerated melting of the remaining glaciers and polar ice.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: The winter of 2009–10 in the United Kingdom (also called The Big Freeze of 2010 by British media) was a meteorological event that started on 16 December 2009, as part of the severe winter weather in Europe.

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).

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: The thawing of permafrost has implications for the global climate.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Global cooling was a conjecture, especially during the 1970s, of imminent cooling of the Earth culminating in a period of extensive glaciation.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Additionally, the global warming induced thawing of the permafrost, which stores about two times the amount of the carbon currently released in the atmosphere, releases the potent greenhouse gas, methane, in a positive feedback cycle that is feared to lead to a tipping point called runaway climate change.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Some media reports have used alarmist tactics to challenge the science related to global warming by comparing it with a purported episode of global cooling.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: "Q&A: How is Arctic warming linked to the 'polar vortex' and other extreme weather?".

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: During this period, a sharp drop in global temperatures took place.