1. write the definition of particulate matter and its 3 classifications depending on the sizes. 2. categorize air pollutants according to the phase and source(human activity) and then write 3 examples for each category. 3. write famous 5 primary and 2 secondary air pollutants. compare the two famous smog disasters in 5 characteristics

tropical storm katrina, and it made landfall between miami and fort lauder-dale, florida, as a category 1 hurricane (a storm that, on the saffir-simpson scale, exhibits winds in the range of 74–95 miles per hour [119–154 km per hour]). sustained winds of 70 miles per hour (115 km per hour) lashed the florida peninsula, and rainfall totals of 5 inches (13 cm) were reported in some areas. the storm spent less than eight hours over land. it quickly intensified when it reached the warm waters of the gulf of mexico.

this should answer you're question

because there are alot of mountains

answerpeople organize large projects such as levee-building;