All papers published in this volume of IOP Conference Series: Earth and Environmental Science have been peer reviewed through processes administered by the Editors. Reviews were conducted by expert referees to the professional and scientific standards expected of a proceedings journal published by IOP Publishing.• Type of peer review: Double-blindAuthor’ s information were removed from the papers before be forwarded to the reviewers. And the authors only got the comments of papers without reviewers’ information.• Conference submission management system: http://papersub.iceeep.org/• Number of submissions received: 419• Number of submissions sent for review: 397• Number of submissions accepted: 221• Acceptance Rate (Number of Submissions Accepted / Number of Submissions Received X 100): Approximately 52.7%• Average number of reviews per paper: 3• Total number of reviewers involved: 878• Any additional info on review process: After preview by editorial assistant, 397 papers were sent for peer reviews, 878 reviewers were involved in the process, and review process for each paper took around 1 month. The decision to accept or reject was based on the reviewers’ comments. If differences of opinion occurred between reviewers, the editors weighed all comments and arrived at a balanced decision based on all comments, or a second round of peer review was initiated.• Contact person for queries: Ms. Iris Yuan, Wuhan Zhiming Cultural Communication Co., Ltd. (secretary@iceeep.org)