Carbon Neutral Systems aims to establish a leading journal in the field of energy transition and carbon neutrality, promoting low-, zero-, and negative-carbon development with cutting-edge technologies, and informing decision-makers with management know-how and in-depth understanding of carbon neutral policies. Applying digitalization and AI technology, integrations of fossil energy and new energy, resources and renewable resources, raw materials and new materials, green manufacturing and cascade utilization, and other technologies and efficient management relating to carbon neutrality will secure sustainable supplies of energy and materials, promote global energy transition, accelerate the development of circular economy, and lay the solid foundation for sustainable and resilient carbon-neutral society in the future. Carbon Neutral Systems welcomes submissions related to energy transition and carbon neutrality that include, but are not limited to: 1. Sustainable energy systems Renewables and energy storage Novel energy conversion Decarbonization of traditional energy Power-to-X and new energy (hydrogen, methanol, ammonia, efuels etc.) Sector coupling to link electricity, heating/cooling, transportation and industry Subsurface energy systems including geo-energy, geothermal, underground energy storage, CCS, CCUS, CCCUS (Carbon Capture, Circular Utilization, and Sequestration) Carbon sink and carbon sequestration of marine and terrestrial ecosystem Short and long-term energy storage Smart grids and microgrids Smart energy Green energy technologies with low, zero, negative carbon emission New theories, methods and technologies for energy research 2. Raw materials supply and efficient utilization of resources Raw-materials supply chain: exploration, mining, mineral processing, metallurgy, processing, trading Raw materials & resource-efficient processing Primary raw materials and high-quality recycling Entire value-creation cycle of natural materials Efficient and stepped use of materials and productions Lifecycle Assessment (LCA) New theories, methods and technologies for research in the raw-materials supply chain Exploration and applications of novel energy conversion 3. Sustainable materials and processes Renewable and recycled materials Low-impact and non-toxic materials Waste reduction and management Eco-design and innovation Circular economy practices Waste resource recycling and utilization Optimized materials for particular characteristics Designing new materials that are not only lightweight and as durable as possible, but also easy and cheap to recycle Efficient processing that enables materials and products to be economically manufactured in large quantities New theories, methods and technologies for material and process research 4. Digitalization and AI for carbon neutral and sustainable society Applications of big data, AI and machine learning in carbon neutrality Trustworthy human-machine collaboration with a focus on safety and a human-centered approach Information theory, stochastic geometry and operation research on energy-efficient NextG for a greener future Engineering dependable software systems looks at various aspects of engineering sustainable products and services, with a focus on processes and development models for secure and high-quality software-based systems New methods and tools in computational engineering also examines aspects of engineering sustainable products and services but focuses on new methods and tools for modeling, simulation, and optimization New models, methods, and processes of digital transformation towards a sustainable and carbon-neutral society 5. Carbon neutral and circular economy Carbon finance, management and policy Carbon footprint and emission monitoring Ecosystem carbon sink and environmental governance Environment, society, governance (ESG) Transition to carbon-neutral & circular economy Circular economy practices.