Ans. Some of the impacts caused by human activities on the sulphur cycle include: The concentration of sulphur is made disproportionate owing to human activities such as excessive burning of fossil fuels as it leads sulphur dioxide concentrations to rise in the atmosphere. The industrial process and refining of petroleum products also cause the release of sulphuric acid to the atmosphere to increase.An increase in sulphur dioxide concentrations in the clouds leads to acid rain on Earth, which gives rise to a series of other impacts including global warming as the sulphur cycle gets adversely affected.