Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to ...

The largest source of sulfur air pollution is the combustion of fossil fuels by power plants. Sulfur dioxide is also produced during industrial processes, such as extracting metal from ore and oil ...

The Clean Air Act requires the EPA to identify and set national ambient air-quality standards to protect people and the environment from pollutants like sulfur oxides, which are mainly produced from ...

Sulfur dioxide pollution, primarily from unregulated coal production, destroyed the air quality across the northern hemisphere in the 20th Century. However, many scientists view sulfur dioxide as only ...

Although the strongest wind gusts have passed through the Southern California region, another "traditional Santa Ana wind event" will move in Thursday night.

As thousands of acres burn across Southern California, wildfire smoke is causing poor air quality in the region and beyond.