The idea of 38th BARCELONA International Conference on “Chemical, Biological and Environmental Sciences” (BCBES-24) scheduled on April 24-26, 2024 Barcelona (Spain) is for the researchers, scientists, scholars, engineers and practitioners from all around the world to present and share ongoing research activities. This conference provides opportunities for the delegates to exchange new ideas and application experiences face to face, to establish business or research relations and to find global partners for future collaboration. Presentation Options: Oral Presentation at Conference Venue (in Physical Presence) Poster Presentation at Conference Venue (in Physical Presence) ONLINE (video presentation with WhatsApp/viber/Skype) OFFLINE (creating PowerPoint presentation without/with recorded voice for conference participants) All registered papers will be online at ISBN DOI Indexed Conference Proceedings OR in the ISSN journals. SCOPUS / World of Science-ESCI Indexed Journals (OPTION