1. the po2 in the lungs at sea level is ~98% o2 saturation~98% o subscript2 saturation the p o 2 in the lungs at sea level is . the saturation of hemoglobin in the lungs at sea level is the saturation of hemoglobin in the lungs at sea level is at p o 2 ~100 mm hg. at po2 ~100 mm hg. 3. the saturation of hemoglobin in the lungs at high altitude of po2 ~80 mm hg is the saturation of hemoglobin in the lungs at high altitude of p o 2 ~80 mm hg is 4. the saturation of hemoglobin at the lungs at an altitude representing po2 ~60 mm hg is closest to the saturation of hemoglobin at the lungs at an altitude representing p o 2 ~60 mm hg is closest to 5. the po2 in the lungs at a high altitude is