The major environmental concern associated with uranium ore milling is:

The major environmental concern associated with uranium ore milling is the production of radioactive tailings. During the milling process, uranium ore is crushed and chemically treated to extract uranium, resulting in a large volume of waste material, known as tailings. These tailings contain not only uranium but also other radioactive elements and heavy metals that can pose significant environmental risks.

The radioactivity and toxicity of these tailings can lead to contamination of soil, water, and air in surrounding areas if not managed properly. This contamination can have long-term effects on the ecosystem and potentially impact human health, especially for those living near milling operations. Proper management and disposal of these tailings are critical to mitigate their harmful effects on the environment and public health.

Understanding the environmental implications of tailings is crucial for professionals in the field of environmental health, particularly within the context of uranium mining and milling operations.