Lower the amount of oxygen available to you and your growing baby.

The amount of oxygen available to the patient in mouth to mouth is around 16%.

Pending advanced intervention, the patient should be brought into fresh air and given medical oxygen if available.

There were large quantities of oxygen freely available for breathing.

Be aware that you have less oxygen available for exercise.

The amount of oxygen available for aerobic exercise decreases during pregnancy.

So when you smoke, your heart - and the rest of your body - has less oxygen available to it.

We're going to get lower and lower on available oxygen as the hours go by.

These two chemicals react with oxygen, when available, and actually generate light.

These blooms can create hypoxic conditions by using all available oxygen.