section 1. Geology and hydrogeology of arsenic -- section 2. Medical and health issues of arsenic -- section 3. Remediation and policy -- section 4. Analytical methods of arsenic -- section S1. Special topic 1 : risk assessment of arsenic from mining -- section S2. Special topic 2 : geomicrobiology of arsenic -- section S3. Special topic 3: geothermal arsenic -- section S4. Special topic 4 : rice arsenic and health perspective -- section S5. Special topic 5 : sustainable mitigation of arsenic : from field trips to policy implications -- section S6. Special topic 6 : biochemical processes of high arsenic groundwater in inland basins.