1.   People usually contract the virus by breathing contaminated air.

2.   Both Susan Sarandon and Natalie Portman deserve to make the short list in February for breathing fresh air into an all-too-familiar mother-daughter act.

3.   Breathing air is cleansed of deadly carbon dioxide in a three-step process.

4.   Aboard Mir, cosmonauts reclaim the water in their breathing air, first capturing it as condensation, then filtering and treating it for use as drinking water.

5.   Discovery has electricity, breathing air, food and water to remain aloft until Thursday if necessary.

6.   For breathing cold air, waves at me.

7.   He tried to join the US Navy, but his lungs, damaged by years of breathing foul air in his submarines, disqualified him.

8.   However, smoking cigarettes still is far more hazardous than breathing polluted air.

9.   John Wilson, a participant in Project Whitecoat, recalled testing a safety suit by breathing contaminated air in a huge stainless steel chamber.

10.   She now takes asthma medication and wears a long-underwear type mask on the ice to keep her breathing warm air.