Smoking induces chronic inflammation, which can directly and indirectly affect the airway and lung parenchyma [5], leading to pathologic changes [6,7,8]
The writer then clearly shows they are moving on to the other argument which is their own (and it has clearly been stated in the thesis that this is their argument): In this paragraph, 'they' is dropped because it is now the writers opinion
I LOVE tobacco scents, and spicy scents, but this...if I smelled this on a man I would assume he had just come from a trip to the mall, where he (hungover and still slightly drunk and definitely not yet bathed) decided to sample some cheap perfumes at a clothing store for teenage boys to cover the fact that he didn't shower
Conversely, perceived usefulness (H 2 ) does not show a significant relationship with behavioral intention ( = 0.048, t = 1.487, p = 0.137)