CO₂ Emissions from Blade Waste Treatments under Wind Power Scenario in Japan from 2021 to 2100

Nogaki S., Ito L., Nakakubo T., et al. CO₂ Emissions from Blade Waste Treatments under Wind Power Scenario in Japan from 2021 to 2100. Sustainability (Switzerland) 16, 2165 (2024); https://doi.org/10.3390/su16052165.Wind power generation has been introduced to reduce carbon emissions; however, recycling or recovering the waste of wind blades, which contain fibre-reinforced plastic, is difficult. Converting the recovered materials for secondary use is also difficult owing to the decreased strength and low material value. Many countries, including Japan, have not considered the future energy and CO₂ emission scenarios, particularly CO₂ emissions from wind blade waste. Based on these scenarios, Japan has planned to introduce large amounts of onshore/offshore wind power generation through 2050. Therefore, we aimed to evaluate quantitatively the total amount of waste and the global warming potential (GWP) from multiple blade waste treatment processes. Based on the average lifetime of blades (20–25 years), we found that the GWP of wind blade waste treatment in Japan may reach a maximum of 197.3–232.4 MtCO2eq by 2060–2065. Based on this lifetime, the wind blade treatment in 2050 accounted for 63.9–80.1% of the total greenhouse gas emissions in 2050. We also showed that the rise in CO₂ emissions from the wind blade wastes would make up 82.5–93.6% of the potential reduction in the GWP, which is achievable by shifting from thermal to wind power generation

A study on basic psychological need satisfactions and frustrations as an index of subjective adjustment to school sport club in college student

The purpose of this study was to examine the effects of basic psychological need satisfactions and frustrations on subjective adjustment to school sport clubs in college student. Eighty-three college students (52 male and 31 female) were assessed the basic psychological need satisfaction and frustration scale and the subjective adjustment to school sport clubs. The basic psychological need satisfaction and frustration scale is composed of 6 subscales: satisfaction and frustration of needs for autonomy, relatedness, and competence. The subjective adjustment scale to sport club consisted 4 subscales related to a sense of comfort, the existence of tasks and purpose, a sense of trust and acceptance, and the absence of a sense of inferiority. Multiple regression analyses were performed with psychological need satisfaction and frustration scale as independent variables, and the subjective adjustment scale as dependent variables. The analysis showed that psychological need satisfaction for relatedness and competence were positively correlated with, and need frustration for autonomy and relatedness were negatively associated with a sense of comfort. In addition, a need satisfaction for autonomy was correlated with the existence of tasks and purposes, and a need satisfaction for competence was also correlated with a sense of trust and acceptance, respectively. Furthermore, need frustration for autonomy, relatedness, and competence were negatively associated with the absence of a sense of inferiority. ANOVA showed that students who have low need satisfaction and high need frustration (LH group) had the lowest scores on the subjective adjustment scale. These findings revealed that basic psychological need satisfaction and frustration played a vital role in adjustment to sport club. Therefore, regular monitoring of their levels would be useful for preventing maladjustment and improving and enhancing of school sports coaching