The water droplets in your breath would simply freeze more quickly than when it is a less extreme temperature (e.g. 10 degrees Fahrenheit). Your breath may appear to "sink" more quickly than in more normal temperatures, but little else would change.
However, the likelihood of -90 degrees Fahrenheit in populated areas, those outside of Antarctica, the extreme Arctic, and the peaks of tall mountains, is small-even in those areas. The coldest temperature ever recorded was -129 degrees Fahrenheit at Vostok Station, Antarctica on July 21st, 1983; so while -90 degrees is certainly possible, it is incredibly unlikely outside of the poles and the tops of the tallest mountains in the world.
The reason you can see your breath in cold weather is because the water vapor in your breath is condensing (condensation). You can't see it in hot weather because condensation can't occur in warmer weather.
carbon dioxide is released into the air.
you first breath in and then you breath out
When you inhale, you breath in oxygen and your lungs get bigger.
NOSE!
then we could not breath.
if it is 32 degrees Fahrenheit or 0 degrees Celsius, than when you breathe out the water in your breath condenses in the air
Your breath is substantially colder than the outside air... when your warm breath suddenly is immersed in that cold air, it forms condensation.
Bad breath
it goes up and out
you die
if you dont breath then you die