Beyond their impacts as separate emissions, SO2, NOx, and mercury together contribute to many air pollution-related problems affecting human health and the environment.
Air pollution has many adverse health effects in humans.
Separately, the elements are harmless, but together create a toxic substance.
A man is at home eating dinner.
A group of friends are planning on riding a hot air balloon
Two soccer players prepare to enter the game on the sidelines.
In East Texas, there are a lot of woods.
A woman writing a letter with an ink pen.
We brought the two children with us though no one brings two children with those seats.