Claim: First, they concur with the believers that the Earth has been warming since the end of a Little Ice Age around 1850.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: Consequently, summers are 2.3 °C (4 °F) warmer in the Northern Hemisphere than in the Southern Hemisphere under similar conditions.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: An ice age is a long period of reduction in the temperature of the Earth's surface and atmosphere, resulting in the presence or expansion of continental and polar ice sheets and alpine glaciers.

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): 1
Passage: In the North Atlantic, sediments accumulated since the end of the last ice age, nearly 12,000 years ago, show regular increases in the amount of coarse sediment grains deposited from icebergs melting in the now open ocean, indicating a series of 1–2 °C (2–4 °F) cooling events recurring every 1,500 years or so.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: The result is a picture of relatively cool conditions in the seventeenth and early nineteenth centuries and warmth in the eleventh and early fifteenth centuries, but the warmest conditions are apparent in the twentieth century.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
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): 0
Passage: The current scientific opinion 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): 0
Passage: The current scientific consensus is that: Earth's climate has warmed significantly since the late 1800s.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: "Global warming in the context of the Little Ice Age".

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Currently there is scientific consensus from a number of American Scientific Societies that the earth's temperature is warming.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Thus current evidence does not support globally synchronous periods of anomalous cold or warmth over this interval, and the conventional terms of "Little Ice Age" and "Medieval Warm Period" appear to have limited utility in describing trends in hemispheric or global mean temperature changes in past centuries.... [Viewed] hemispherically, the "Little Ice Age" can only be considered as a modest cooling of the Northern Hemisphere during this period of less than 1°C relative to late twentieth century levels.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: The IPCC First Assessment Report in 1990 noted evidence that Holocene climatic optimum around 5,000-6,000 years ago had been warmer than the present (at least in summer) and that in some areas there had been exceptional warmth during "a shorter Medieval Warm Period (which may not have been global)" about AD 950-1250, followed by a cooler period of the Little Ice Age which ended only in the middle to late nineteenth century.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: The Little Ice Age was a period from about 1550 to 1850 when the world experienced relatively cooler temperatures compared to the time before and after.