A higher than normal level of carbon dioxide in the blood. This suggests that ventilation in the air sacs of the lungs (alveoli) is inadequate possibly because the sensitivity of the respiratory centre to raised CO2 levels has been affected. In health, hypercapnia always causes an increased rate and depth of breathing.
The treadwear grade is a comparative rating based on the wear rate of the tire when tested under controlled conditions on a specified government test track. A tire graded 200 would last twice as long on the government test course under specified test conditions as one graded 100.
Wedges are one of the many options women have when it comes to footwear. These shoes are named after the heel that is shaped like a wedge. Unlike the typical high heel, this one runs the length of the shoe from back to front or the middle of the shoe. Wedges have been around for quite a few decades and have gone in and out of style a number of times.