1. Water present and future: Prospects for overcoming scarcity. 2.?Nature-Based Wastewater Treatment Technologies: Concept, Understanding, Opportunities and Future Prospectus. 3.?Constructed Wetlands as an emerging and effective wastewater treatment technology for decentralized locations. 4. Use of nature-based technologies for the treatment of wastewater from municipal slaughterhouse. 5.?Use of plant-based coagulants for wastewater treatment in underdeveloped communities: sources, processes, effectiveness and associated mechanism. 6.?Phytoremediation of organic and inorganic contaminants from industrial wastewater. 7. Activity and role of different extracellular enzymes for deterioration of pollutant within the root zone of macrophytes. 8.?Integration of nature-based wastewater treatment technologies with other available technologies as a tertiary treatment unit. 9.?Reuse of treated water for agricultural activities: Situation, opportunities and environmental risks and associated health problems. 10.?PGPR of assisted phytoremediation of Industrial Wastewater for Environmental Sustainability. 11.?Role of biosurfactant in wastewater treatment: Current research and future. 12. Microbial Adsorbent for heavy metal removal from wastewater for environmental safety. 13.?Microbial-assisted phytoremediation of industrial wastewater recycling and reuses for overcoming water scarcity. 14.?Wastewater treatment through exopolysaccharides-producing microbes. 15.?Agro-industrial waste-based adsorbent for wastewater treatment: current pilot and industrial-scale applications. 16. Bacterial ligninolytic enzymes as green and versatile agents for wastewater treatment. 17