Well 1). is it a abcd answer ? 2). influences can be good and they could be bad but in this generation its actually hard to find a good influences because drugs are steadily rising fights with the law and etc . but there will always be a good influence if you look in the right places .
Yes, laughing gas can kill if used for recreational purposes without properly safety in place. All of the things listed in question can happen along with hypoxia (low O2 levels) if person does not breathe in O2 in regular intervals.
