Do you ever hear on the news that there are pollutants in the air or the pollen count is high? Shawn is going to check out an air quality monitoring station and find out where these reports come from. Plus, he’ll visit the office of a commercial realtor and find out why this is such a challenging but fascinating career. He’s also going to see how an ultrasound technologist uses sound waves to capture images of a pregnant woman’s baby to obtain different types of information about the baby.