Energy and environment are critical important for our sustainable development. Novel materials and nanomanufacturing techniques provide new opportunities for this important research area. This issue has nine interesting papers dedicated to thermoelectrics, alkali-activated materials (AAMs), nano-materials, and perovskite quantum dots. With growing concerns for greenhouse gas emissions, AAMs have received enormous attention due to the benefit of low carbon footprint. Wengui Li et al. (DOI: 10.30919/esmm5f204) presents a critical review on the durability performance of alkali-activated system. It will provide guidelines for the research community as well as to the stakeholders of AAMs industries who seek sustainability in their products.