Claim: “Some experts, such as UN climate scientist Dr. Indur Goklany, have defended rising CO2 levels as a good thing for humanity.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: A 2017 Politico article states that increased CO 2 levels may have a negative impact on the nutritional quality of various human food crops, by increasing the levels of carbohydrates, such as glucose, while decreasing the levels of important nutrients such as protein, iron, and zinc.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: While increased CO 2 levels help crop growth at lower temperature increases, those crops do become less nutritious.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: It is likely that anthropogenic (i.e., human-induced) warming, such as that due to elevated greenhouse gas levels, has had a discernible influence on many physical and biological systems.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: During the late 20th century, a scientific consensus evolved that increasing concentrations of greenhouse gases in the atmosphere cause a substantial rise in global temperatures and changes to other parts of the climate system, with consequences for the environment and for human health.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Man-made carbon dioxide according to the IPCC contributes to global warming.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: The Intergovernmental Panel on Climate Change (IPCC) reports that increased quantities of the greenhouse gas carbon dioxide within the atmosphere will "very likely" lead to higher average temperatures on a global scale (global warming).

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: International Council of Academies of Engineering and Technological Sciences (CAETS) in 2007, issued a Statement on Environment and Sustainable Growth: As reported by the Intergovernmental Panel on Climate Change (IPCC), most of the observed global warming since the mid-20th century is very likely due to human-produced emission of greenhouse gases and this warming will continue unabated if present anthropogenic emissions continue or, worse, expand without control.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Singer argues there is no evidence that the increases in carbon dioxide produced by humans cause global warming, and that if temperatures do rise it will be good for humankind.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: There is a scientific consensus linking human activities to global warming due to industrial carbon dioxide emissions.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Singer argues, contrary to the scientific consensus on climate change, that there is no evidence that global warming is attributable to human-caused increases in atmospheric carbon dioxide, and that humanity would benefit if temperatures do rise.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: "High levels of atmospheric carbon dioxide necessary for the termination of global glaciation".

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Rajendra Pachauri, the UN's "top climate scientist" and leader of the Intergovernmental Panel on Climate Change (IPCC) has come out, as have others, in favor of reducing atmospheric concentrations of carbon dioxide to 350 ppm.