How is sulfur trioxide bad for the environment?

Answer 1

Sulphur trioxide is an hydroscopic gas, and will readily dissolve in (rain)water forming sulphuric acid ( acid rain).

Here is the chemical reaction eq'n.

SO3(g) + H2O(l) = H2SO4(aq).

Answer 2

Sulfur trioxide can react with moisture in the air to form sulfuric acid, a major component of acid rain. This acid rain can harm plants, aquatic life, and infrastructure, and contribute to the acidification of soil and water bodies. Sulfur trioxide emissions also contribute to air pollution and can have adverse effects on human health.

Answer 3

It can react with water vapor in air or other water sources to produce fumes of sulfuric acid, which is very corrosive and will damage the environment.