Bulgaria has the highest concentrations of the two major varieties of particulate matter (airborne droplets or gas particles). This can lead to major health problems like asthma and cancer. If you walk through Sofia, Bulgaria is a white shirt, you will notice that by the end of the day, the shirt will have a yellow- gray hue. Bulgaria is not alone. Poland is a runner up and cities located in northern Italy lead in ozone. Reports have shown that there is less and less air pollutants throughout Europe, but particulates and ozone remain problems in this continent. The population in Bulgaria does not live in a healthy environment. Because of Bulgaria’s history with the Soviets, it has made little progress cleaning up its air. Part of the problem is that Bulgarians and their neighbors is that they use wood for home heating. Poland is where coal-burning dominates. That causes a lot of problems in the air. Italy’s ozone problem is because of a combination of weather and industry. Surveys show that a large majority of citizens understand well the impact of air quality on health and are asking public authorities to take action.