Nanomaterials have allowed significant breakthroughs in bio-engineering and medical fields. In the present paper a holistic assessment on diverse biocompatible nanocomposites are studied. Their compatibility with advanced fabrication methods such as additive manufacturing for the design of functional medical implants is also critically reviewed. The significance of nanocomposites and processing techniques is also envisaged comprehensively in regard with the needs and futures of implantable medical device industries.

Despite the drive for increased environmental protection and the achievement of the Sustainable Development Goals (SDGs), coal, oil, and natural gas use continues to dominate Japan’s energy mix. In light of this issue, this research assessed the position of natural gas, oil, and coal energy use in Japan’s environmental mitigation efforts from the perspective of sustainable development with respect to economic growth between 1965 and 2019. In this regard, the study employs Bayer and Hanck cointegration, fully modified Ordinary Least Square (FMOLS), and dynamic ordinary least square (DOLS) to investigate these interconnections. The empirical findings from this study revealed that the utilization of natural gas, oil, and coal energy reduces the sustainability of the environment with oil consumption having the most significant impact. Furthermore, the study validates the environmental Kuznets curve (EKC) hypothesis in Japan. The outcomes of the Gradual shift causality showed that CO₂ emissions can predict economic growth, while oil, coal, and energy consumption can predict CO₂ emissions in Japan. Given Japan’s ongoing energy crisis, this innovative analysis provides valuable policy insights to stakeholders and authorities in the nation’s energy sector.

New Zealand's (NZ) thirst for hydrocarbon‐based fuels for transportation is rising exponentially, resulting in two severe consequences: first, severe emissions of greenhouse gases and a range of pollutants, and second, the dependence on foreign petroleum imports to provide those fuels. Thus there is a stimulus to develop, and to utilise, energy systems that are reliable and sustainable. The implementation of the hydrogen‐based fuel cell (FC) system for electric vehicles (EVs) appears to be a promising solution because the FC is now established as a reliable, non‐polluting energy source, having a high power density that competes favourably with the conventional internal combustion (IC) engine and the battery vehicle. This study provides a comprehensive review of the proton exchange membrane (PEM)‐based FC, and assesses its potential in FC vehicles as an alternative to internal‐combustion‐based vehicles for NZ cities. The study indicates a need for FCs to penetrate the automotive market, plus key government and business strategies for the introduction of PEM EVs.