to help remove the nasty odors in areas.
yes
they wre invented in 1946 by bob surloff but they were mostly used in cars and looked like this one
Air fresheners can deplete ozone. If they contain depleting CFC's.
If you get close enough to where the spider is, yes air fresheners kill spiders.
Automatic air fresheners are a newer fad going on right now. Some of the main companies that make automatic air fresheners are Glade, and Air Wick. However, these air fresheners are not always the best choice.
chemicals
No
pop it open
Occasional exposure to air fresheners isn't likely to cause problems, as long as the products are used as directed. However, the chemicals in air fresheners may irritate your eyes, skin and throat. In addition, long-term use of air fresheners may contribute to indoor pollution - which can sometimes trigger asthma and other lung problems.
the air fresheners in the bathroom were cameras
There are many air freshener options. The most popular air fresheners are febreeze and glade. Both products have a large variety of scents and offer many styles of air fresheners as well.