What are the major sources of sulfur dioxide in the atmosphere?

The major sources of sulfur dioxide in the atmosphere primarily include the combustion of fossil fuels and volcanic eruptions. When fossil fuels such as coal, oil, and natural gas are burned for energy production, sulfur contained in these fuels is released into the atmosphere in the form of sulfur dioxide. This process is significant because fossil fuels are widely used for electricity generation, transportation, and industrial activities, making it a major contributor to air pollution.

Volcanic eruptions also significantly contribute to sulfur dioxide emissions. During an eruption, large amounts of gases, including sulfur dioxide, are expelled into the atmosphere. This natural phenomenon can cause temporary spikes in atmospheric sulfur dioxide levels, impacting air quality and contributing to phenomena such as acid rain.

In contrast, while agricultural waste burning, industrial processes, and natural gas emissions may produce various pollutants, they are not the primary contributors to sulfur dioxide levels in the atmosphere when compared to fossil fuel combustion and volcanic activity. Each source plays a role in air quality, but the combustion of fossil fuels and volcanic eruptions are the key sources directly linked to sulfur dioxide emissions.