Question

If you have asthma, high amounts of (blank) can make it worse.

greenhouse gasses
air pollution
air pressure

Answer 1

air pollution probably i mean think about it if youre breathing in air thats bad for you it could make your lungs freak out 

Answer 2

Air pollution is the answer. The substances in the air could be pollutants which can harm your airways which can be really harmful to an asthmatic. I personally know because i have asthma myself.

Hope I hepled :)