What is the arsenic contamination problem in Bangladesh?
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Arsenic contamination of groundwater is a major public health issue in Bangladesh. Naturally occurring arsenic in the soil leaches into shallow tube wells, affecting water consumed by millions of people. Long-term exposure causes skin lesions, cancers, and cardiovascular diseases. The government has tested millions of tube wells and marked unsafe ones with red paint. Solutions include deep tube wells (below 200m), arsenic removal filters, rainwater harvesting, and surface water treatment. The Bangladesh Arsenic Mitigation Water Supply Project coordinates response efforts.