What harmful effects can sulphur have in mining and coal utilization?

The presence of sulfur in mining and coal utilization is primarily associated with negative environmental impacts. When coal containing sulfur is burned, it can release sulfur dioxide (SO2) into the atmosphere. This gas reacts with water vapor in the air to form sulfuric acid, contributing to the formation of acid rain. Acid rain can have detrimental effects on ecosystems, soils, and water bodies, resulting in damage to aquatic life, vegetation, and even man-made structures. Therefore, the option highlighting the link between sulfur and pollution, as well as acid rain, accurately captures the harmful consequences associated with sulfur in coal utilization.

The other options mistakenly suggest positive attributes of sulfur. Increasing coal weight and improving quality do not align with the harmful nature of sulfur in environmental terms. Enhancing combustion efficiency is also incorrect, as sulfur compounds often lead to more complex combustion processes, which can reduce overall efficiency and increase emissions.