An overhead view captures the interior of a light-colored, circular container holding a sample of turbid, greenish-yellow liquid

An overhead view captures the interior of a light-colored, circular container holding a sample of turbid, greenish-yellow liquid. The bottom of the container is partially covered by a large, irregular mass of brown, fibrous organic matter. Interspersed with this matter and suspended in the liquid are numerous patches and filamentous strands of bright green material, consistent with algae or aquatic vegetation. Multiple spherical gas bubbles, ranging in size from pinpoint to approximately 3mm in diameter, are visible throughout the liquid, often clustered near the organic material. Fine, dark particulate matter is also suspended within the liquid, particularly in the right half of the image. The sample's characteristics are consistent with water or sediment collected from a polluted aquatic environment, such as the Ganges River or an associated water body within Varanasi, India.