The 2021 2nd International Conference on Green Energy, Environment and Sustainable Development (GEESD2021) was held successfully on June 26, 2021. Due to the COVID-19 pandemic around the world, and with the strict travelling rules in China, it was still difficult for our attendees abroad to travel internationally. Therefore, GEESD2021 was held both in physical form (Shanghai, China) and online (Zoom).

About 80 attendees have participated in the conference. The one-day conference was divided into three parts: two keynote speeches in the morning, each 45 minutes, and 16 oral presentations, each 15 minutes, in the afternoon. Besides, 44 e-posters were presented on the conference website. The session chairs and keynote speakers have worked together to selected the best oral presentation and poster presentation.

This year, GEESD2021 attracted more than 250 submissions, and 88 of them have been accepted to be included in this collection of papers. The process of evaluation and peer-review lasted for about 6 months, with more than 100 TPC members and reviewers involved in. We would like to express our sincere gratitude to all experts for their professional and detailed review comments, which have contributed to the high standard of this collection.

This proceedings consists of three main parts: (1) Sustainable Energy; (2) Ecology; (3) Environmental Pollution and Protection, with the most up-to-date findings and technologies being discussed. We believe participants of GEESD2021 have gained knowledge as well as met new friends in the same field. And we hope this proceedings will benefit the readers in the same way.

Changbo Cheng

Hubei Zhongke Institute of Geology and Environment Technology