The increasing air pollution in Asia is what making the smog in western United States worst. Even though the government is controlling most smog emitting factories, it won't work as long as pollution is Asia is prominent, the study stated.
The smog in eastern part of the United States has decreased but the continuous heat waves can increase its level. Also, Science Daily has reported that based on the last quarter century data smog in the western U.S. rural sites have increased during springtime. It is very important that U.S. government maintain their control over the smog-emitting factories, according to a new study from Princeton University and the National Oceanic and Atmospheric Administration's Geophysical Fluid Dynamics Laboratory (GFDL).
The study, which looked at the cause of smog from the 1980s until today, stated that the increase of smog in the rural areas in the western U.S. is because of the pollution from Asian countries. Countries like China, North and South Korea, Japan, India, and other South Asian countries. These places have tripled their smog-forming chemicals like the infamous nitrogen oxides, commonly known as "NOx" in the last 20 years. "Increasing background ozone from rising Asian emissions leaves less room for local production of ozone before the federal standard is violated," said lead author Meiyun Lin, a research scholar in the Program in Atmospheric and Oceanic Sciences at Princeton University and a scientist at GFDL.
Meanwhile, in the eastern U.S., heat waves are the prominent thing. It has trapped air pollution in place, which leads to increase of locally produce ozone. Smog or ground-level ozone is very dangerous to human health. It can bring asthma attack, which causes difficulty in breathing. It is also very dangerous to some crops and plants that are sensitive, Phys.org reported.
Scientists are going to further study the effects of pollution and lengthened heat waves. They are expecting that these occurrences is going to continue and will affect more people and places. They are advising governments to start doing something about it.
