WEEK 3 TASK 3:Meteorologists Use Weather Knowledge to Predict Path of Toxic Spills

http://www.sciencedaily.com/videos/2005/0511-weather_system_protects_homeland_security.htm
The video is talking about meteorologists want to use the weather systerm to find out
the polution way of the poison materials.Like some polutions cause by nuclear energy,the weather systerm may help to clear the polution.