However, reams
of peer - reviewed research, basic physics, the ability to track the specific chemical fingerprint
of fossil fuel - driven
carbon, and the fact that no models can replicate this century's warming
without pumping up
carbon dioxide and other greenhouse gases in the atmosphere give scientists confidence that
human carbon emissions are driving the globe's temperature higher.
This means the IPCC is tasked with finding a
human effect
of human carbon dioxide emissions on the climate, whereas NIPCC looks at climate change «in the round,»
without bias.
E.g., research assumes greenhouse gas
emissions cause warming
without explicitly stating
humans are the cause»...
carbon sequestration in soil is important for mitigating global climate change» (4a) No position Does not address or mention the cause
of global warming (4b) Uncertain Expresses position that
human's role on recent global warming is uncertain / undefined «While the extent
of human - induced global warming is inconclusive...» (5) Implicit rejection Implies
humans have had a minimal impact on global warming
without saying so explicitly E.g., proposing a natural mechanism is the main cause
of global warming»... anywhere from a major portion to all
of the warming
of the 20th century could plausibly result from natural causes according to these results» (6) Explicit rejection
without quantification Explicitly minimizes or rejects that
humans are causing global warming»... the global temperature record provides little support for the catastrophic view
of the greenhouse effect» (7) Explicit rejection with quantification Explicitly states that
humans are causing less than half
of global warming «The
human contribution to the CO2 content in the atmosphere and the increase in temperature is negligible in comparison with other sources
of carbon dioxide emission»»