Greenpeace has uncovered evidence that the intensive coal mining activities in Indonesia’s South Kalimantan province are discharging toxic pollution into rivers, and in some instances, violating national standards for wastewater discharges from mines. Local environmental authorities have failed to stop or prevent the violations. Due to the large amount of coal mining, almost half of the province’s rivers are at risk of being affected by water pollution from the mines. Climate and energy campaigner Arif Fiyanto blogs about the impact of coal mining on South Kalimantan