# How to Understand Air Pollution Graphs

If you are interested in learning about how bad the air we breathe is, then you should learn to read and understand air pollution graphs. The air pollution graphs available for you online are very useful tools for understanding pollution. You will find many types of graphs, including pie graphs, and bar graphs that will help you learn about pollution in an easy to understand way. There are air pollution graphs for different countries, cities, and states, and the information on each will very drastically. When looking at a graph you will see what types of pollutants are in what areas, and how much of each is emitted by what means. For instance, an air pollution pie graph showing primary air pollutants in the U.S., would tell you that the two most abundant pollutants, are particulate matter at 36%, and carbon monoxide at 38%. This pie graph would also include, at a much lower percent, sulfur oxides at 8%, nitrogen oxides at 9%, and volatile organic compounds at 9%. Then the two largest slices of the pie are particulate matter and carbon monoxide taking up over 1/3 of the pie each. Without even reading the percentages, you would be able to tell at a glance that these two, are the most abundant pollutants in the United States. This is why air pollution graphs are so useful. You don’t even need to be able to understand percentages to find pie or bar graphs a useful tool.

Once you start to recognize the parts of each type of graph, then you will get the information they are trying to show you, quickly and easily. When you are looking at a pie chart, you will easily be able to learn something like carbon monoxide is the most common pollutant in the United States. Bar air pollution graphs, use bars to communicate information to you. If you see that a certain color like green represents carbon monoxide then you can see that the bar goes up to the number that corresponds with it. Sometimes, both pie, and bar air pollution graphs, are used together to communicate many different ideas at once. You may know from the pie graph that carbon monoxide is the most abundant pollutant, and it is represented by the color green. Then you can look at the green bar on the bar graph, and see that the green bars represent how much of each source of air pollution, produces carbon monoxide. From an air pollution graph like this, you could learn that 85% of the pollutants produced by transportation are carbon monoxide. Understanding these graphs will help you to quickly identify information you may need to know about air pollution.