1. Green Energy and application
Green energy is a very popular source of energy throughout the world today. The development and application of green energy have progressively increased in various fields. The 'Green Energy and Application' topic provides space for experts and practitioners to disseminate current issues related to the, challenges, development, and application of green energy in the worldwide.

• Renewable energy resources and application
• Low-carbon technologies
• Energy modelling
• Energy science and technology
• Waste recycling energy
• Energy storage and conservation
• Materials for green energy
• Sustainable energy

2. Environmental Science and Technology
Science and technology are expected to resolve environmental problems and improving environmental quality. This topic is provided to explore the issues, innovations, and integrated approaches of science and technology towards environmental sustainability.

• Environmental data analysis and modelling
• Hydrology and water resources engineering
• Waste engineering and treatment
• Innovation in health and environment applications
• Smart cities for a sustainable development
• The environmental footprint of tourism
• Environmental-friendly technology
• Green Building & architecture
• Materials for environmental sustainability
• Water quality control and modelling
• Climate change, and ecosystem restoration
• Environmental pollution and remediation

3. Energy and Environmental Management
Energy management is aims to conserve energy resources, climate protection, and cost savings. Energy & environment management has a very close co-relation. Environmental management is optimizing the consumption of energy to minimize the interference of the energy cycle. Several issues related to planning, management, policies, risk assessment, and monitoring in relationship with the energy and environment are very interesting to discuss in this topic.

• Waste management
• Environmental analysis and monitoring
• Energy and environmental risk assessment
• Water resources management
• Environmental education
• Environmental planning, management and policies
• Ecosystem management, and modelling
• Marine environment and coastal management
• Sustainable energy policies and management
• Regulation and financing for energy and environment