The development of new biopolymer production technologies is becoming increasingly relevant for tackling the negative impact of linear plastics. Despite these potential benefits, their production and commercialization still face several obstacles that might hinder their widespread adoption. The present systematic review aimed to offer a thorough analysis of the multi-level supply-side barriers across researchers, policymakers, and industry professionals. Searches were performed in Web of Science, SCOPUS, PubMed, and IEEE Xplore between June and July 2023. Publications between 2019 and 2023 were considered for analysis (n = 176). Content was coded following a PICO structure and the results were reported following the PRISMA checklist. We found that technological and knowledge barriers were the most identified, followed by economic, regulatory, supply stability, and behavioral challenges. Moreover, we found that 82% of the documents identified more than one barrier, reflecting the complex interaction between the different challenges in the field. Fostering interdisciplinary collaboration, establishing clear regulatory frameworks, and enhancing communication strategies are relevant recommendations for overcoming these barriers. These findings draft a multifaceted roadmap of the key barriers in the commercialization of new, sustainable biopolymer production technologies, and carry significant implications for future research, policy development, and industry practices.

Choosing food is not a trivial decision that people need to make daily, which is often subject to social influences. Here, we studied a human homolog of social transmission of food preference (STFP) as observed in rodents and other animals via chemosignals of body secretions. Human social chemosignals (sweat) produced during a disgust or neutral state among a group of donors were presented to participants undergoing a 2-alternative-forced-choice food healthiness judgment task during functional magnetic resonance imaging (fMRI). Response speed and two key signal detection indices— d’ (discrimination sensitivity) and β (response bias)—converged to indicate that social chemosignals of disgust facilitated food healthiness decisions, in contrast to primary disgust elicitors (disgust odors) that impaired the judgment. fMRI analyses (disgust vs. neutral sweat) revealed that the fusiform face area (FFA), amygdala, and orbitofrontal cortex (OFC) were engaged in processing social chemosignals of disgust during food judgment. Importantly, a double contrast of social signaling across modalities (olfactory vs. visual—facial expressions) indicated that the FFA and OFC exhibited preferential response to social chemosignals of disgust. Together, our findings provide initial evidence for human STFP, where social chemosignals are incorporated into food decisions by engaging social and emotional areas of the brain.

Three studies are reported examining the grounding of abstract concepts across two modalities (visual and auditory) and their symbolic representation. A comparison of the outcomes across these studies reveals that the symbolic representation of political concepts and their visual and auditory modalities is convergent. In other words, the spatial relationships between specific instances of the political categories are highly overlapping across the symbolic, visual and auditory modalities. These findings suggest that abstract categories display redundancy across modal and amodal representations, and are multimodal.

Emerging issues related to climate change have been explored in recent years as the need for appropriate behavioral solutions grows. However, one of the main problems raised and yet to be solved is the challenge to encourage people to act against climate change. One of the identified barriers is the mental indirect link between the influence of human activities in the present and their future consequences. This psychological distance could be investigated by examining temporal discounting—the overvaluation of benefits in the present compared to benefits in the future—and its relationship to environmental behavior on consumers’ attitudes toward green purchasing. In this research, we conducted a survey (n = 337) to examine the relationship between temporal discounting and perceived seriousness of environmental behavior and investigated the moderating effect of consumers’ attitudes regarding green purchasing. The results show a moderating effect of these consumers’ attitudes on the relationship between temporal discounting and perceived seriousness of environmental behavior. These findings make important contributions to environmental policies by rethinking and adapting new solutions that promote behavioral change, namely by exploring psychological variables and identifying green consumption profiles.

This research investigates the forecasts that people make about the duration of positive versus negative emotions, and tests whether these forecasts differ for self versus for others. Consistent with a motivated thinking framework, six studies show that people make optimistic, asymmetric forecasts that positive emotions will last longer than negative ones. However, for other people, wishful thinking is absent, and therefore people make less optimistic, more symmetric forecasts. Potential implications of these motivated forecasts and self-other differences are discussed.

This research tested whether observing members of a dyad behave in synchrony influences observers’ expectations and intentions about that dyad. In four studies, participants observed a dyad move in synchrony and were asked to make inferences about them. Results suggest that interpersonal synchrony serves as a social cue, such that observers expect the members of the dyad to work well together. Moreover, synchrony makes observers more likely to want to affiliate with the dyad. These findings shed light on how the social function of synchrony extends beyond the people who experience it to those who observe it.