Which of these are claims of pseudoscience most likely based on

in a word, a scientific question is testable. a testable question is one that asks about objects, organisms or events found in the world around it

i believe you meant to say air rather than hair so the answer is below ")

the dead sea, the lowest place on earth at 430 metres (1,410 ft) below sea level, has a correspondingly high typical atmospheric pressure of 1065 hpa.