Claim: That humans are causing the rise in atmospheric CO2 is confirmed by multiple isotopic analyses.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: While CO 2 absorption and release is always happening as a result of natural processes, the recent rise in CO 2 levels in the atmosphere is known to be mainly due to human (anthropogenic) activity.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: Analysis of carbon isotopes in atmospheric CO 2 shows that the recent observed CO 2 increase cannot have come from the oceans, volcanoes, or the biosphere, and thus is not a response to rising temperatures as would be required if the same processes creating past lags were active now.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: Global anthropogenic greenhouse gas emissions in 2010 were equivalent to 49 billion tonnes of carbon dioxide (using the most recent global warming potentials over 100 years from the AR5 report).

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Cumulative anthropogenic (i.e., human-emitted) emissions of CO 2 from fossil fuel use are a major cause of global warming, and give some indication of which countries have contributed most to human-induced climate change.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: US National Academy of Sciences: "In the judgment of most climate scientists, Earth's warming in recent decades has been caused primarily by human activities that have increased the amount of greenhouse gases in the atmosphere.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Human activities, primarily the burning of fossil fuels (coal, oil, and natural gas), and secondarily the clearing of land, have increased the concentration of carbon dioxide, methane, and other heat-trapping ("greenhouse") gases in the atmosphere...There is international scientific consensus that most of the warming observed over the last 50 years is attributable to human activities.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Human activities have caused CO 2 to increase above levels not seen in hundreds of thousands of years.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: In 2007 climate scientists of the IPCC concluded that there was at least a 90% probability that atmospheric increase in CO2 was human-induced, mostly as a result of fossil fuel emissions but, to a lesser extent from changes in land use.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: The reason for this is that human activities are adding CO2 to the atmosphere faster than natural processes can remove it (see carbon dioxide in Earth's atmosphere for a complete explanation).

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Network of African Science Academies: "A consensus, based on current evidence, now exists within the global scientific community that human activities are the main source of climate change and that the burning of fossil fuels is largely responsible for driving this change."

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Atmospheric concentrations of anthropogenic (i.e., human-emitted) greenhouse gases have increased substantially.