Add an appropriate non- defining relative clause to the following sentences

the complete subject is

lorna

it depends on the natural disaster. a good one you can choose are hurricanes. water vapor is the "gas" and warm fronts are the "spark". because of the global warming that humans have caused with green house gases, hurricanes have become more frequent and stronger, making them more dangerous.

if the underlined pronoun is "me", it is the first person in the objective case. the first person in the subjective case os "i".