This describes Mr. Harvey, the serial killer, who has killed and gotten away with it so often that he almost believes his own innocence.
Answer:
It means he was enjoying his life as a author.
After reading the passage, it my be said that the narrator seems to feel that despite being busy all day, he had the chance to enjoy the place, to breath. maybe it was like an "injection" of energy for him this such fresh air he was able to feel. he is even comparing it to a place with a polluted air which gives him another perspective of the fresh air he was able to find in this place.
Answer:
Inventor Elon Musk introduced an idea for a new transportation system.
Explanation: