can someone give me an example of an industry that has positive and negative externality affected on the economy

Lawyers.
Pharmacecutial companies.
Fast Food Industries (consider the long term health car costs of eating that stuff)
Tobacco
Gambling
in fact, most of the Sin Industries are in that category.
Oprah, and other soaps...think of the lost productive time watching that garbage.

so what i am looking for would be for example the tobacco industy the negative affects are plan for people to see would be like the health care insurance rate costily habit for an individual what woul dbe the positive affect be for this industry i can see maybe the only positive affect would be the jobs

am i on the right track

Sara I believe the positive affect of the all of these examples would be economic they bring in allot of money to community with what they are producing. Tobacco it self I f I am not mistaken brings in billions of dollars a year. am I right looking at this way