claim: Evidence is building that net cloud feedback is likely positive and unlikely to be strongly negative.
evidences.evidence_id: Evidence-based medicine:126
evidences.article: Evidence-based medicine
evidences.evidence: Large effect: This is when methodologically strong studies show that the observed effect is so large that the probability of it changing completely is less likely.
evidences.votes: REFUTES NOT_ENOUGH_INFO
evidences.evidence_id: Evidence-based medicine:92
evidences.article: Evidence-based medicine
evidences.evidence: A 2007 analysis of 1,016 systematic reviews from all 50 Cochrane Collaboration Review Groups found that 44% of the reviews concluded that the intervention was likely to be beneficial, 7% concluded that the intervention was likely to be harmful, and 49% concluded that evidence did not support either benefit or harm.
evidences.votes: REFUTES NOT_ENOUGH_INFO
evidences.evidence_id: Evidence:1
evidences.article: Evidence
evidences.evidence: This support may be strong or weak.
evidences.votes: NOT_ENOUGH_INFO NOT_ENOUGH_INFO
evidences.evidence_id: Global warming controversy:219
evidences.article: Global warming controversy
evidences.evidence: Other analyses have found that the iris effect is a positive feedback rather than the negative feedback proposed by Lindzen.
evidences.votes: SUPPORTS SUPPORTS
evidences.evidence_id: Global warming controversy:226
evidences.article: Global warming controversy
evidences.evidence: One theory is that the climate may reach a "tipping point" where positive feedback effects lead to runaway global warming; such feedbacks include decreased reflection of solar radiation as sea ice melts, exposing darker seawater, and the potential release of large volumes of methane from thawing permafrost.
evidences.votes: SUPPORTS NOT_ENOUGH_INFO