This issue consists of 8 articles from 22 authors affiliated with 10 institutions from 5 countries including

• Indonesia (Sampoerna University, UIN Sunan Gunung Djati Bandung, Universitas Pendidikan Indonesia)
• India (Osmania University)
• Nigeria (Ahmadu Bello University, Nigerian Institute of Transport Technology (NITT), University of Ilorin)
• Iraq (Northern Technical University, University of Basra)
• United States (The University of Arizona)

Articles

Why 200°C is Effective for Creating Carbon from Organic Waste (from Thermal Gravity (TG-DTA) Perspective)?

Risti Ragadhita, Asep Bayu Dani Nandiyanto

Regression Study on the Impact of Vehicular Emission Pollutants on Ozone Level: Chemical and Material Perspectives

Patricia Adamma Ekwumemgbo, Idongesit Edem Okon

A Review of Recent Advancements in Geophysical Technologies and Their Implications for Mineral and Hydrocarbon Exploration

K. Haritha

Synthesis, Characterization, and Antimicrobial Studies of Some Metal (II) Complexes of Some Azo Dyes

Ruth Cecilia Aladesusi, Uche Basil Eke

Green Concrete: Ferrock Applicability and Cost- Benefit Effective Analysis

Arzu M. Hadi, Kamalaldin F. Hasan, Inas M. Ahmed, Maha A. Meteab, Qais F. Hasan

Effect of Additional Natural Filler Waste on The Mechanical Properties of Polyurethane Polymer

Ahmed J. Mohammed, Muhsen Chelab Muhsen, Ibrahim K. Ibrahim

Mechanical Design and Analysis of Eco-Print Textile Pounding Machine

Rhainna Rheizkhira Reflin, Steven Henderson Chang, Kushendarsyah Saptaji, Farid Triawan

Application of Project-Based Worksheets for Making Conditioner from Aloe Vera (Aloe vera L.) to Develop Students' Scientific Performance

Trie Rizqi Fatmala, Neneng Windayani, Ferli Septi Irwansyah