气候变化是全人类面临的共同挑战，科学界已达成共识，人类活动是气候变 化的主要原因，例如汽车尾气引发温室气体大量排放，经常使用一次性餐具造成 自然资源的过度消耗，长时间开启空调造成能源的过度消耗。因此，增加个体的 亲环境行为，促进个体的生活方式向绿色低碳转变，是减缓气候变化的关键之一。 以往研究大多关注人口学、外部等因素在促进和阻碍亲环境行为中的作用，例如 受教育程度、文化、社会规范等。然而，个体的情绪状态会直接影响其对问题的 感知和行动的积极性，是亲环境认知和行为的基础动力，更多地了解情绪对亲环 境行为的影响有可能会激发有关环境保护的更大社会变革。

希望作为面向未来的积极情绪，既包含对未来积极结果的期望，也体现出个 体实现目标的决心和认知。在应对气候变化这一复杂且长期的挑战中，希望能够 激发人们在不确定性中抓住成功的机会，增强减缓气候变化的动力。因此，希望 是亲环境行为的重要影响因素。目前对于希望如何影响亲环境行为的研究结果并 不一致，究其原因，一方面，当个体对应对气候变化抱有较高希望水平时，更有 可能相信自己能够改善环境状况，并且认为自己的行动能够对环境产生积极影响， 从而促使他们在日常生活中做出更多的亲环境行为;另一方面，较高的希望水平 也可能增强个体对政府和企业等重要他人的应对气候变化行动信任度，相信强大 的他人能扭转气候变化局面，从而导致个体对气候变化威胁行动的感知紧迫性被 削弱。

据此，本研究通过两个研究检验了希望对亲环境行为的影响，以及不同来源 的环境控制感的中介作用。研究一通过线上问卷调查初步探索了希望、环境控制 感和亲环境行为的关系，发现希望显著增加个人环境控制感从而促进个体的私领 域和公领域亲环境行为;希望也能够增加个体的他人环境控制感，从而正向影响 私领域亲环境行为，负向影响公领域亲环境行为。研究二通过视频操纵个体的希 望水平，发现希望能够通过增加个人环境控制感，从而促进个体表现出更高的私 领域亲环境行为意向和捐献出更多金钱以改善环境状况;希望也能够通过增加他 人环境控制感使个体表现出更高的私领域亲环境行为意向，但更高的他人环境控 制感导致了更少的环境捐款金额。综合研究一、研究二结果发现，个人环境控制 感中介了希望对亲环境行为的积极影响，他人环境控制感中介了希望对公领域亲 环境行为的消极影响。这些研究结果从积极情绪角度为如何激励个体进行亲环境 行为提供了思考和实践启示意义。

Climate change is a common challenge faced by all mankind, and the scientific community has reached a consensus that human activities are the main cause of climate change, such as the large amount of greenhouse gas emissions caused by automobile exhaust fumes, the overconsumption of natural resources caused by the frequent use of disposable tableware, and the overconsumption of energy caused by turning on air conditioners for long periods of time. Therefore, increasing individuals' pro- environmental behaviors and promoting a shift in their lifestyles toward green and low- carbon is one of the keys to mitigating climate change. Most previous studies have focused on the role of demographic, external, and other factors in promoting and hindering pro-environmental behaviors, such as education level, culture, and social norms. However, an individual's emotional state directly affects his or her perception of problems and motivation to act, and is the underlying motivation for pro- environmental cognition and behavior, and a greater understanding of the impact of emotions on pro-environmental behavior has the potential to inspire greater social change regarding environmental protection.

Hope, as a future-oriented positive emotion, encompasses both the expectation of a positive future outcome and the individual's determination and perception to achieve the goal. In the complex and long-term challenge of addressing climate change, hope can inspire people to seize opportunities for success in the midst of uncertainty and increase motivation to mitigate climate change. Therefore, hope is an important influence on pro-environmental behavior. The results of current research on how hope influences pro-environmental behavior are inconsistent. The reasons for this are that, on the one hand, when individuals have a higher level of hope in combating climate change, they are more likely to believe that they can improve the environmental situation and that their actions can positively affect the environment, which motivates them to engage in more pro-environmental behaviors in their daily lives; on the other hand, higher levels of hope are also likely to enhance individuals' trust in the climate change actions of significant others, such as governments and corporations, and believe that powerful others can reverse climate change, leading to a weakening of individuals' perceived urgency to act on the threat of climate change.

Accordingly, this study examined the effects of hope on pro-environmental behavior and the mediating role of different sources of perceived environmental control through two studies. Study 1 preliminarily explored the relationship between hope, perceived environmental control, and pro-environmental behaviors through an online questionnaire, and found that hope significantly increased individuals' perceived environmental control and thus facilitated individuals' private and public domain pro- environmental behaviors; hope was also able to increase individuals' perceived environmental control of others, thus positively influencing private domain pro- environmental behaviors and negatively influencing public domain pro-environmental behaviors. Study 2 manipulated individuals' levels of hope through video and found that hope can increase individuals' sense of personal environmental control, which promotes individuals to show higher private sphere pro-environmental behavior intentions and donate more money to improve environmental conditions; hope can also increase individuals' sense of other's environmental control so that individuals show higher private sphere pro-environmental behavior intentions, but higher sense of other's environmental control leads to lower environmental donation Amount. Combining the results of Studies 1 and 2, it was found that individuals' sense of environmental control mediated the positive effects of hope on pro-environmental behaviors, and others' sense of environmental control mediated the negative effects of hope on pro-environmental behaviors in the public domain. These findings provide food for thought and practical implications for motivating individuals to engage in pro-environmental behaviors from a positive emotion perspective.