Question

The most harmful environmental pollutants are ______.

Options

• human organic wastes

• wastes from feedlots

• non-biodegradable chemicals

• natural nutrients present in excess

Answer 1

The most harmful environmental pollutants are non-biodegradable chemicals.

Explanation:

Non-biodegradable chemicals, such as pesticides (DDT, BHC), heavy metals (mercury, cadmium), and other synthetic compounds, do not break down easily in the environment. They accumulate in the ecosystem through biological magnification, causing long-term damage to living organisms, disrupting ecological cycles, and posing serious health risks to humans and wildlife. Thus, they are considered the most harmful pollutants compared to organic wastes, feedlot wastes, or natural nutrients in excess.