All papers, both invited and contributed, will be reviewed by two or three experts from the committees. After a careful reviewing process, all accepted papers of WCHBE 2019 will be published by IOP Conference Series: Earth and Environmental Science (EES)(Online ISSN: 1755-1315, Print ISSN:1755-1307) and submitted to EI Compendex, Scopus, Inspec, DOAJ and CPCI for indexing.