Have you run out of ideas of where to find graphs on air pollution over the years? Check this article to see if it has more ideas for you.
Air pollution graphs provide an excellent aid to researching trends in air pollution over the years. Used in every country, graphs on air pollution over the years are required by law in some countries and states of the U. S. There are many types of graphs on air pollution over the years, depending on the use to which the representations are put.
Graphs of air pollution over the years may be bar graphs, used to present changes in air pollution levels at specific points in time such as days, weeks or months. The horizontal axis usually represents the time line, while the vertical axis represents the air pollution level. Bar graphs are often used in green education school curricula because they are clear and simple for students to compile.
As an industry standard, all graphs on air pollution over the years use the average air pollution level for the horizontal graph axis period, i. e., average carbon dioxide reading for a day, week, month, etc. These standards allow comparisons of apples to apples from air pollution monitoring sites all around the globe. Researchers can be sure that their comparisons of U. S. and Chinese air pollution levels are scientifically rigorous.
Graphs on air pollution over the years are readily available from the web sites of every air quality monitoring agency in the world. National agencies like the U. S. EPA (Environmental Protection Agency) have thousands of graphs of air pollution over the years, by state and national region. State and local governments have graphs of air pollution over the years for smaller areas, right down to subdivisions of towns and cities.
There are many kinds of air pollution, and graphs on each over the years. The U. S. EPA sets air quality standards on six common air pollutants and keeps graphs on all of them. They are:
- carbon monoxide (CO)
- ozone (O3)
- lead (Pb)
- nitrogen dioxide (NO2)
- particulate matter (PM)
- sulfur dioxide (SO2)
Each year, the EPA looks at the levels of these pollutants in the air and the emissions from various sources to see how both have changed over time and to summarize the current status of air quality. Graphs are a major part of the annual review process. The EPA provides these graphs of air pollution over the years at Air Trends.
In States prone to wildfires, graphs of particulate air pollution caused by smoke and soot are often kept and made available via the Web. These graphs can help people with respiratory illnesses predict when they are most likely to be affected by particulate air pollution, and plan their activities and treatment accordingly.
Graphs of air pollution over the years are valuable tools in measuring, monitoring, and controlling air pollution. They also provide the public with feedback on the effectiveness of their tax dollars spent on air quality control. Graphs of air pollution over the years are used in scientific research, in education, and in litigation. They are versatile and ubiquitous.