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The importance of knowledge for lay people's climate change concerns has been questioned in recent years, as it had been suggested that cultural values are stronger predictors of concern about climate change than knowledge. Studies that simultaneously measured knowledge related to climate change and cultural values have, however, been missing. We conducted a mail survey in the German-speaking part of Switzerland (N = 1,065). Results suggested that cultural worldviews and climate-related knowledge were significantly related with people's concern about climate change. Also, cultural worldviews and climate-relevant knowledge appeared important for people's willingness to change behaviors and to accept climate change policies. In addition, different types of knowledge were found to have different impacts on people's concern about climate change, their willingness to change behaviors, and their acceptance of policies about climate change. Specifically, causal knowledge significantly increased concern about climate change and willingness to support climate-friendly policies. We therefore concluded that risk communication should focus on causal knowledge, provided this knowledge does not threaten cultural values.

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In three experiments, we manipulated procedural fairness (Experiment 1) and group-based anger and group efficacy (Experiments 2 and 3) to investigate the independent pathways of anger and efficacy for collective action in China. In Experiment 3 we also examined pathways to “soft” (low-cost) and “hard” (high-cost) collective action. Our results supported the dual-pathway model of collective action: group-based anger and perceived group efficacy independently predicted collective action intentions to protest against increased school fees and unhygienic cafeteria conditions for Chinese university students. Group-based anger predicted soft collective action intentions; both anger and efficacy predicted hard collective action intentions. Identification with the disadvantaged group was found to moderate the problem-focused coping pathway for hard collective action intentions. For high but not low identifiers, manipulated group efficacy predicted hard collective action intentions. We discuss our findings with specific reference to collective action research in China.

Solar radiation management (SRM) aims to counteract the negative consequences of global warming and is considered for deployment in the event that mitigation and adaptation efforts appear insufficient. However, because the potential ecological and political side effects of SRM are not well understood, and because SRM will cross national boundaries, an international research perspective on the general public's perception of this technology is required. We conducted an online survey on the general public's perception and acceptance of SRM in Canada, China, Germany, Switzerland, the UK, and the USA. Our findings confirmed the need for an international perspective, as we found several cross-country differences. Chinese respondents, for example, indicated greater acceptance for SRM than their North American and European counterparts. Moreover, results of regression analyses on acceptance of SRM by country revealed that lower acceptability ratings for SRM in Canada and Europe were mostly related to stronger beliefs that SRM tampers with nature. Chinese respondents, by contrast, were more accepting of SRM when they held stronger beliefs that it may reduce the motivation to adopt burdensome climate change mitigation efforts. Although our researchand previous studies-suggest that opposition to SRM remains, dismissing the technology entirely on these grounds and without conducting a careful, cross-national, and Climatic Change transdisciplinary decision-support process to set up an international policy regime seems premature as people from countries that are less prepared to mitigate and adapt to climate change seem to be more supportive of SRM.

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