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According to readings from the Mauna Loa Observatory,CO2 concentrations in May 2013 exceeded which of the following for the first time during the last 800 000 years?
Pulse Oximetry
A non-invasive test that measures the saturation of oxygen in a person's blood using a clip-like device typically attached to a finger, earlobe, or toe.
Blood Oxygen
The level of oxygen saturation in the blood, which is vital for the efficient functioning of body organs.
Echocardiography
A diagnostic test that uses ultrasound waves to create images of the heart, helping in the assessment of its structure and function.
Blood Flow
The continuous movement of blood through the circulatory system of the body, delivering oxygen and nutrients to tissues while removing waste products.
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