A Student was 19 in. long when she was born. She is now 5 ft 6 in. tall and 23 years old. How many centimeters a year did she grow on average?

Well, the easiest way to do this would be:

She grew 5 ft 6 in - 18 in = 4 ft in all her 20 years.

Honestly "global warming" may be a slight possiblity, however they called it "climate change" because its not real, in fact we had one of our coldest days here not too long ago, and the "issues" with this subject is a blindfold for actual problems.