Positive and negative externalities of airline industry

Find 2 sources to help you answer the following questions about the industry you chose:

Research any negative or positive externalities the industry produces.

1) Does the transaction of a buyer and seller directly affect a third party? Is the effect a negative or positive externality? Please explain.
Research whether the industry produces public goods or common resources.

2) Are the goods or resources rival, excludable, or neither? Please explain.
Organize your research using the Annotated Bibliography above. APA formatted references and a summary of the major points in the article or web sites.