What should be removed from industrial wastewater before it is released into the environment?

The correct answer highlights the need to remove organic matter and harmful chemicals from industrial wastewater before it is discharged into the environment. Organic matter can deplete oxygen levels in water bodies, leading to detrimental effects on aquatic life. Harmful chemicals, including heavy metals and toxic substances, can pose significant risks to both human health and ecosystems. Their removal is crucial to prevent pollution and preserve environmental integrity.

While excessive nutrients and pathogens, plastic and metal debris, and fibers and textiles can also negatively impact the environment, the presence of organic matter and harmful chemicals is particularly critical in industrial wastewater treatment. These substances require targeted removal due to their potential to cause severe ecological damage and health hazards. This emphasizes the importance of comprehensive water treatment processes in maintaining safe and clean water systems.