Which of the following is an example of how the same chemicals used to people can harm the environment?

One example would be car fuel.  We use it for transportation, but when we burn it up, it goes up into the atmosphere and begins to break down our ozone layer.  

i don't see a text, but i am gonna assume this *orbit* the curved path, usually elliptical, described by a planet, satellite, spaceship, etc., around a celestial body, as the sun.