According to the United Nations (UN), although cities occupy only 3% of Earth’s surface, they host more than half of the global population, are responsible for 70% of energy consumption, and 75% of carbon emissions. All this is a consequence of the massive urbanization verified since the 1950s and which is expected to continue in the coming decades. A crucial issue will therefore concern the management of existing cities and the planning of future ones, and this was also emphasized by the UN Sustainable Development Goals (SDGs), especially in Goal 11 (Sustainable Cities and communities). Smart Cities are often seen as ideal urban environments in which the different dimensions of a city (economy, education, energy, environment, etc.) are managed successfully and proactively. So, one of the most important challenges cities will have to face, is to guide citizens towards a form of “clean” energy consumption, and the dimension on which decision-makers will be able to work is the decarbonization of transport. To achieve this, electric mobility could help reduce polluting emissions on the road. Within this research, the strategies that six Smart Cities (London, Hamburg, Oslo, Milan, Florence, and Bologna) have implemented to encourage the transition to this form of mobility have been studied. Through a systematic review of the literature (Scopus, Google Scholar, and Web of Science) and through the study of the main political/energy documents of the cities, their policies on electric mobility have been evaluated. Then, for each city, SDG 11.6.2 was analyzed to assess the air quality in the last four years (2016–2019) and, therefore, the effectiveness of the policies. The analysis showed, in general, that the policies have worked, inducing reductions in the pollutants of PM_2.5, PM₁₀, NO₂. In particular, the cities showed the most significant reduction in pollutant (above 20%) were Hamburg (−28% PM_2.5 and −2%6 NO₂), Milan (−25% PM_2.5 and −52% NO₂), and London (−26% NO₂).

Rice is the most widely used cereal for human consumption, attributing its production as one of the most important activities for the global population. Therefore, given its economic and nutritional value, assessing the sustainability of this production process could be worth noting. In this regard, this research aims to investigate the most recent literature related to Life Cycle Assessment (LCA) of rice primary production, to clarify the extent to which Life Cycle Thinking (LCT) and thus the three pillars of sustainability have been applied in the rice sector, as well as to highlight possible research gaps. Thus, 40 articles (2012–2022) were analyzed. The main research gaps that were found were, firstly, that there was a lesser tendency to consider multiple functional units, highlighting how little multifunctionality is considered. As to be expected, there was also a great difference in methodological choices, which often leads to a great variability of results, making evaluations and comparisons of impacts uncertain. These were also highly dependent on soil and climate conditions in the various countries, which could in turn affect input utilization, and results. The study of the impacts of primary rice production was then addressed by a few countries, among which some of the largest producers were absent, while the least considered aspects were related to the depletion of abiotic resources and the promotion of organic farming. Finally, sustainability assessments in rice production had little focus on the socio-economic dimension, showing how little LCT is considered. Therefore, based on this consideration, a Social Life Cycle Assessment was integrated into the study, the results of which show that the countries with medium to high social impacts could be India, Sri Lanka, Thailand, and Bangladesh.

The collection of the organic fraction in Italy recorded significant growth in the decade 2010–2019 (+74%) due to both the increase in the spread of separate waste collection as well as the increase in the biological treatment plants of municipal waste. However, within the organic fraction there remains a share of non-compostable material (NCM) (plastic, glass, aluminum, etc.), equal to ~5% of the total, which affects the efficiency of composting practices as well as decreasing both the yield and the quality of the final compost, causing a portion of organic material to be subtracted from composting and ending up in landfills. Therefore, the purpose of this work is to evaluate how the sustainability of the organic fraction collection and the amount of compost obtained in the composting plants could improve, following the use of biodegradable and compostable bioplastic bags (shoppers), in replacement for conventional plastic ones. The Life Cycle Assessment (LCA) and Carbon Footprint (CF) methodology was used for the assessment, comparing two different scenarios based on data relating to the collection of the organic fraction in Italy in 2019. Scenario 1 relates to the composting of organic material that also contains plastics, bioplastics, and non-compostable materials, while in scenario 2 the share of plastic material in the first scenario has been entirely replaced by bioplastics. The results show that scenario 2 assumes the lowest values for 15 impact categories out of the 18 analyzed, and, among these, in three categories it assumes negative values: ozone formation-terrestrial ecosystems (−1.64 × 10⁻² kg NO_X eq), ozone formation-human health (−8.50 × 10⁻³ kg NO_X eq), and fossil resource scarcity (−4.91 × 10² kg oil eq). Furthermore, scenario 2 has a negative carbon footprint (−3.80 kg CO₂ eq) compared to scenario 1 (79.71 kg CO₂ eq), and in general it is the most sustainable scenario as a direct consequence of the greater amount of compost obtained (307.4 kg vs. 269.2 kg).

The aviation sector makes up 11% of all transportation emissions and is considered a “hard to abate” sector since, due to the long distances to be traveled, opportunities for electrification are rather limited. Therefore, since there are no alternatives to fuels, Sustainable Aviation Fuels (SAFs), or fuels produced from biomass, have recently been developed to reduce climate-changing emissions in the aviation sector. Using Life Cycle Assessment, this research evaluated the environmental compatibility of different SAF production routes from seven biomasses: four food feedstocks (Soybean, Palm, Rapeseed, and Camelina), one non-food feedstock (Jatropha curcas L.), and two wastes (Waste Cooking Oil, or WCO, and Tallow). The evaluation was carried out using SimaPro 9.5 software. The results showed that the two potentially most favorable options could be Camelina and Palma, as they show minimal environmental impacts in 4 and 7 out of 18 impact categories, respectively. Soybean, on the other hand, appears to be the least sustainable precursor. Considering GWP, SAF production could reduce the values compared to fossil fuel by 2.8–3.6 times (WCO), 1.27–1.66 times (Tallow), 4.6–5.8 times (Palm), 3.4–4.3 times (Jatropha), 1.05–1.32 times (Rapeseed), and 4.36–5.5 times (Camelina), demonstrating the good environmental impact of these pathways. Finally, the sensitivity analysis showed that SAF production from waste could be an environmentally friendly option, with rather low environmental impacts, in the range of 5.13 g CO₂ eq/MJ for Tallow and 3.12 g CO₂ eq/MJ for WCO. However, some of the energy would have to come from sustainable energy carriers such as biomethane and renewable sources such as photovoltaic energy.

Carob pulp flour has antidiabetic and antioxidant activities, is naturally sweet, and is rich in fibers. It is obtained from carob pod pulp from the evergreen tree Ceratonia siliqua L., which is grown in Mediterranean areas and is known for locust bean gum production. Despite its valuable effects on health, such as the modulation of the glycemic index, this ingredient has a tremendous impact on technological and hedonic features, mainly on color, flavor, and texture. In this paper, the qualitative features and consumers’ acceptance of a carob-based gluten-free bakery product where rice flour was substituted at 40% with carob pulp flour were studied. A panel group of experts described the bread as dark, quite dense, sweet, aromatic, and with a limited bubble dispersion. On the other hand, the sensory assessment and the willingness to pay of consumers were assessed in two groups (a fully informed one about heathy attributes of the food and a blind one). The results indicated a moderate appreciation of the overall quality of the product (average score between 4 and 5 points on a 9-point Likert scale). The information about the food’s healthy properties and the ability to maintain a low glycemic index did not enhance the consumers’ perception of the product, while previous knowledge and involvement in the product consumption were perceived to have primary importance regarding the final consumers’ choice. Finally, an accelerated shelf-life test was run on the packaged snack to evaluate the general quality and stability. The protective packaging helped in limiting bread decay and maintaining the textural characteristics.

The production of beer, a beverage of global cultural and industrial importance, has a significant impact on the environment due to the use of natural resources and the emissions generated during the various stages of the production process. Therefore, this article examines the sustainability of beer production through a review of literature articles that have used Life Cycle Assessment (LCA) to assess its environmental impacts. A systematic literature review was conducted by selecting peer-reviewed articles published between 2001 and July 2024 using databases such as Scopus and Google Scholar. The search included studies analyzing different stages of the beer life cycle, from raw material production to packaging and distribution, using specific keywords related to LCA and brewing. The results showed that energy use and packaging are the two critical aspects identified in the review, which represent a significant part of the environmental footprint. However, it is important to note that the available studies on the subject are few and heterogeneous and they use different methodologies, impact categories, and functional units, which complicates the comparison and synthesis of results, limiting the ability to draw definitive conclusions. Recommendations were made to improve sustainability, including the adoption of more efficient technologies, the use of recycled materials for packaging, and the implementation of sustainable agricultural practices. These strategies could aim to significantly reduce the overall environmental impact of beer production.