An International Conference named 2021 5th International Conference on Advances in Energy, Environment and Chemical Science invited Nur Islami as a Keynote Speaker on 26-28 February 2021 in Shanghai, China. In this conference, Nur Islami delivered the keynote speech entitled: Application of geoelectrical resistivity method for the assessment of shallow aquifer quality in landfill areas (http://www.aeecs.org/speaker)