Question

What negative effect occurs when there is a decrease in air quality?

faster evaporation of water in the soil
the drying out of fertile land, resulting in dust bowls
the melting of glaciers and polar ice caps
increased illnesses that result in a decrease in population

Answer 1

Increased illnesses that result in a decrease in population.

Poor air quality (pollution, particulates, ground‑level ozone) directly causes respiratory and cardiovascular diseases and higher mortality; the other choices are more directly linked to climate change effects.