Cleaner City Air

In this week's atmospheric Naked Scientists, we're putting the air that we breathe under the microscope. We find out how air quality is monitored, how new technology could help you plan the least polluted walk to work and why seaweed might be responsible for making it rain! Also, we find out why dolphins spit for their dinner, how every cloud may have a lead lining and how the pesky mosquito's inspired a portable artificial pancreas. Plus, we get the low-down on the latest pandemic candidate - swine flu.