I was told to Unscramble this overstuffed sentence by making shorter, clearer sentences.

I was told to Unscramble this overstuffed sentence by making shorter, clearer sentences.A smoke-filled room causes not only teary eyes and runny noses but also can alter people's hearing and vision,as well as creating dangerous levels of carbon monoxide, especially for people with heart and lung ailments,whose health is particularly threatened by secondhand smoke.