Nothing; the air concentration is low.
If by thicker you mean more dense then the answer is no.
Ammonia is less dense than air at room temperature and pressure. This is why ammonia gas rises in air.
Warm air is less dense (lighter) than cold air..that is why warm air rises and cold air settles
If a balloon is filled with a substance that's less dense than air ... such as helium, hydrogen, steam, or warmer air ... then the balloon is less dense than air.
The air inside a balloon is less dense than the air around it. When the balloon is inflated, it contains less air molecules compared to the same volume of air outside the balloon, making it less dense.
No it is more dense than hot air
b. Warm air is as dense as cooler air. Temperature has a direct impact on air density, with warmer air being less dense than cooler air at the same pressure.
Helium and neon are less dense than air; argon, krypton, xenon and radon are denser than air.
Warm air is less dense then cold air. But moist air is actually less dense than dry air because water vapor has a lower molecular weight than the oxygen and nitrogen that make up most of the atmosphere.
Carbon Dioxide is less denser than air.
Helium is a gas that is less dense than air. This is why a balloon filled with helium rises when released.
it is less dense