Our air quality is really great? Just because you can not see smoke or mist does not mean that our air is clean because some things can not be seen. The U.S. Air Quality Index to measure air quality, and benchmarking. This helps the EPA (Environmental Protection Agency) keeps an eye on pollution things.How much there? Let's count rates. Well, maybe not, but here are some people that our atmosphere, give our body and even cause disease. Diseases such as lung cancer, bronchitis and even heart problems. And that's just human problems. Similar conditions occur in plants, animals and aquatic life to begin well.Let with SO2 – sulfur dioxide. This compound is obtained from natural sources like volcanoes, and there is much we can do about it. The industry and its processes also emit this substance. They are often associated with energy, coal, oil, acid gases, and these can release sulfur in a more irritating and dangerous: H2S (hydrogen sulfide). Professional air quality also meet the nitrogen oxides (NOx) are often on their travels. The inaugural meeting of this group is our most NO2, nitrogen dioxide. This is hot air, almost 80% nitrogen, nitrogen atoms in the late match free oxygen atoms released by combustion. So you must see this one of the cars and other engines and flames. Both NO2 and SO2 at low concentrations harmless, but when the industries of coagulation and increased traffic intensity as they do in cities, the air a little thick.How an important problem is this? Many eastern U.S. states, where older industries still prosper, have high NO2 and SO2 readings. In response, the EPA designated the Clean Air Interstate Rule, CAIR, the control of these levels, the reduction of SO2 and NOx by 70% to 60% of connections by 2015. The savings in health costs alone go a long way to offset any increased costs associated with this initiative. And Americans life expectancy longer, healthier, better quality, lives.What on acid rain. Here's an invisible ghost in the atmosphere. Wet deposition of sulfur and other acids from aqueous solutions of carbon, sulfur and nitrogen reduction in the pH of rainwater. The same industries that use fuel and / or spitting generation capacity of these elements described above: coal, oil and natural gas. As we have alternative means of power generation for development, we see the level of chemicals that cause acid rain to fall as well.What alternative methods? The use of renewable fuels is a good start. Solar energy, hydropower, nuclear and wind power to provide all or greatly reduced emissions of acidifying substances per kilowatt-hour generated. The last century, which has not been easy in our environment and health of residents in affected areas, reflects this. A little too well. The U.S. government EPA established in 1970 that 17,000 researchers, teachers and other services today. This group aims to reduce pollution to stay healthy and safe.What next? We have a number of relevant facts here, but a little extra effort required. The U.S. shovels and other countries in their efforts to damage through the years to invest. People can begin by obtaining the additional knowledge they need. Then you can intelligently decide what to do. Our future may depend.