The conventional agricultural sector is threatened by several factors that cause unsustainable development and serious environmental damage. Circular agriculture is regarded as an essential means and is being adopted globally by many countries. Through a narrative literature review, this article aims to discuss the concepts, theories, and practices of circular agriculture, and to draw recommendations for successful implementation. The findings reveal that circular agriculture focuses on promoting resource circularity in the agro-food value chain, minimizing external inputs, reducing resource requirements, regenerating bio-ecosystems, and reducing environmental impacts to meet increasing food demands and improve producers' livelihoods. Circular agriculture differs from conventional agriculture in terms of its principles, levels of circularity, evaluation criteria, and practices. Circular agriculture practices have been adopted globally due to their economic, social, and environmental benefits. However, circular agriculture still encounters obstacles to widespread adoption, such as vested interests and existing policies. Thus, a comprehensive strategy for circular agriculture development should include rethinking and repurposing the sector development strategy; enhancing changes in producer and consumer awareness and behaviors regarding circular agriculture and organic products; increasing investments in circular technology research and development; providing more incentives for producers to access credit and extension services, produce organic products, and to reuse and recycle agricultural resources; and strengthen farmers' organizations to adopt circular farming technologies.

Waste sorting at the source has been identified as a crucial solution for sustainable waste management in developing countries like Vietnam. Numerous previous studies have investigated the factors influencing waste sorting behavior among consumers. However, there has been limited research on consumers’ capability in waste sorting at source, particularly the role of information. Without sufficient consumer capability in waste sorting, contamination continues to be a widespread problem, posing a challenge to the sustainability of such programs. A survey using the ASK (Attitude-Skill-Knowledge) model was conducted with 228 participants in Lao Cai city, Vietnam, to assess how information enhances consumer capability in waste sorting. This study indicated that: (1) Both information quality and information accessibility could affect overall consumer capability toward waste sorting at the source; (2) Information accessibility is important in determining all ASK component, while interestingly, information quality plays an important role in determining consumers’ attitudes toward waste sorting at the source. The study suggested some solutions for enhancing consumer capability in waste sorting program, including engaging all stakeholders, leveraging technology, educational campaigns, and regular updates on waste sorting at the source information.