Anthony Leiserowitz

Human-caused climate change is happening; nearly all climate scientists are convinced of this basic fact according to surveys of experts and reviews of the peer-reviewed literature. Yet, among the American public, there is widespread misunderstanding of this scientific consensus. In this paper, we report results from two experiments, conducted with national samples of American adults, that tested messages designed to convey the high level of agreement in the climate science community about human-caused climate change. The first experiment tested hypotheses about providing numeric versus non-numeric assertions concerning the level of scientific agreement. We found that numeric statements resulted in higher estimates of the scientific agreement. The second experiment tested the effect of eliciting respondents' estimates of scientific agreement prior to presenting them with a statement about the level of scientific agreement. Participants who estimated the level of agreement prior to being shown the corrective statement gave higher estimates of the scientific consensus than respondents who were not asked to estimate in advance, indicating that incorporating an "estimation and reveal" technique into public communication about scientific consensus may be effective. The interaction of messages with political ideology was also tested, and demonstrated that messages were approximately equally effective among liberals and conservatives. Implications for theory and practice are discussed.

There is currently widespread public misunderstanding about the degree of scientific consensus on human-caused climate change, both in the US as well as internationally. Moreover, previous research has identified important associations between public perceptions of the scientific consensus, belief in climate change and support for climate policy. This paper extends this line of research by advancing and providing experimental evidence for a "gateway belief model" (GBM). Using national data (N = 1104) from a consensus-message experiment, we find that increasing public perceptions of the scientific consensus is significantly and causally associated with an increase in the belief that climate change is happening, human-caused and a worrisome threat. In turn, changes in these key beliefs are predictive of increased support for public action. In short, we find that perceived scientific agreement is an important gateway belief, ultimately influencing public responses to climate ...

ABSTRACT This study tests a model of reinforcing spirals in the context of global warming, using a 2-wave, within-subjects panel survey with a representative sample of Americans. Results show that, within waves, conservative media use is negatively related to global warming belief certainty and support for mitigation policies, while nonconservative media use is positively associated with belief certainty and policy support. In addition, the results show that consuming conservative or nonconservative media at Wave 1 makes people more likely to consume those same media at Wave 2, partly as an indirect result of the media's effects on global warming belief certainty and policy preferences. Wave 2 media use, in turn, further strengthens audiences' global warming belief certainty and policy preferences.

Prior research has found that affect and affective imagery strongly influence public support for global warming. This article extends this literature by exploring the separate influence of discrete emotions. Utilizing a nationally representative survey in the United States, this study found that discrete emotions were stronger predictors of global warming policy support than cultural worldviews, negative affect, image associations, or sociodemographic variables. In particular, worry, interest, and hope were strongly associated with increased policy support. The results contribute to experiential theories of risk information processing and suggest that discrete emotions play a significant role in public support for climate change policy. Implications for climate change communication are also discussed.

Climate change poses significant risks to societies worldwide, yet governmental responses differ greatly on either side of the North Atlantic. Risk perception studies have shown that citizens in the United States and Great Britain have similar risk perceptions of climate ...

1 October with much to celebrate, but the road ahead for the world's most populous nation is uncertain. Since the 1979 economic reforms ended collective agriculture, opened foreign trade, and began to give more autonomy to the business sector, China has achieved rapid ...