Warm glow and pro-environmental behavior: Supportive evidence from behavioral tasks

Climate change is a highly emotional issue: for example, many people experience negative emotions like climate anxiety and eco-depression. Recent work emphasizes that positive emotions also influence how individuals engage with sustainability and pro-environmental behavior. Behaving environmentally friendly may elicit positive feelings (warm glow), which could drive a self-reinforcing positive feedback loop of great applied value. However, previous research was largely limited to self-reported pro-environmental behavior, which can have low validity for environmental impact. Here, we investigated the relationship between warm glow and pro-environmental behavior using two consequential behavioral tasks. In Study 1 (n = 237), participants who made more pro-environmental decisions in the Carbon Emission Task experienced more warm glow. Pre-registered Studies 2 (n = 803) and 3 (n= 953) used the tedious Work for Environmental Protection Task for a more severe test that again showed more warm glow after more pro-environmental behavior. In addition, anticipated warm glow before the task predicted pro-environmental behavior, and behavioral effort mediated the relationship between anticipated and experienced warm glow. Together, these results provide a strong demonstration that acting pro-environmentally can elicit positive affect.