Question

elements such as cadmium, lead, and mercury have been found in massive amounts in europes environment. these are linked to a wide range of health - related issues, such as kidney disease, bone damage, and cancer. the most common way these elements are put into the environment is by a toxic waste. b air pollution. c nuclear waste d water pollution

Explanation:

Cadmium, lead, and mercury are heavy metals. Toxic waste is a broad category that can include industrial waste containing these heavy metals. Air pollution (B) mainly involves gases like sulfur dioxide, nitrogen oxides. Nuclear waste (C) involves radioactive materials. Water pollution (D) can be a result of toxic waste disposal. But the most common source putting these elements (heavy - metal containing) into the environment is toxic waste as it can contaminate soil, water, and air through improper disposal from industries.

Answer:

A. toxic waste