Despite widespread scientific consensus on climate change, conspiracy theories about its causes and consequences are flourishing. In response, psychological research has started to investigate the consequences of espousing conspiracy beliefs about climate change. Although some scholars maintain that the evidence for a causal link between belief in conspiracy theories and behavior remains elusive, others have argued that climate change conspiracy theories undermine pro-climate action. To shed further light on this question across a range of outcome measures, we present a meta-analysis of 22 independent samples (N_participants = 20,765). Overall, we find clear evidence that climate conspiracy beliefs have moderate-to-large negative correlations with not only acceptance of (climate) science, trust, and pro-environmental concern, but also with behavioural intentions and policy support. Most of these effects were not moderated by design (experimental vs. correlational), political ideology, or prior conspiracy beliefs. However, we note publication bias and in several cases sufficient experimental data were lacking. Implications for addressing conspiracy theories about climate change are discussed.

尽管在气候变化方面存在广泛的科学共识，但关于其原因和后果的阴谋论却盛行。作为回应，心理学研究已经开始调查支持关于气候变化的阴谋论的后果。尽管一些学者坚持认为阴谋论信念与行为之间存在因果关系的证据仍然难以捉摸，但其他人认为气候变化阴谋论破坏了亲气候行动。为了在一系列结果测量中进一步阐明这个问题，我们对 22 个独立样本（N_{名参与者）进行了荟萃分析}= 20,765)。总体而言，我们发现明确的证据表明，气候阴谋信念不仅与接受（气候）科学、信任和亲环境问题有关，而且与行为意图和政策支持有中到大的负相关。这些影响中的大多数都没有受到设计（实验性与相关性）、政治意识形态或先前的阴谋信念的影响。然而，我们注意到发表偏倚，并且在某些情况下缺乏足够的实验数据。讨论了解决有关气候变化的阴谋论的影响。