"Air Pollutants From Abroad A Growing Concern, Says New Report" -12

"Air Pollutants From Abroad A Growing Concern, Says New Report"
Science Daily. Retrieved at: http://www.sciencedaily.com/releases/2009/09/090929132509.htm

Harmful air pollutants not only stay around locally and harm the areas that it is in; it crosses oceans and flows from one continent to another. Emissions from any country can be completely harmful for a country different from the country that it is starts, affecting humans and ecosystems around the world. There are four types of pollutants that travel through the air over the northern hemisphere, and satellites are actually able to catch some of the pollutants through the hemisphere. It is still difficult to determine which pollutant causes what in the air. It is known that where it lands it can cause respiratory problems for people. Some of the pollutants found in the United States can be traced back to emissions and pollutants from inside Asia. They were able to track how long it took to cross the pacific from Asia to the observatory in Oregon, which took eight days.