Nothing; the air concentration is low.
The stratosphere contains air that is less dense than that in the troposphere primarily due to the decrease in atmospheric pressure with altitude. As you move higher in the atmosphere, the weight of the air above decreases, leading to lower density. Additionally, the temperature in the stratosphere generally increases with altitude, which can also contribute to the lower density of air compared to the cooler, denser air found in the troposphere.
If by thicker you mean more dense then the answer is no.
The air in the stratosphere is relatively thin compared to the lower layers of the atmosphere, such as the troposphere. While it contains ozone, which absorbs and scatters ultraviolet solar radiation, the overall density of air in the stratosphere decreases with altitude. As a result, there is less air pressure and fewer air molecules in this layer, making it less dense than the air we breathe at ground level.
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.
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.
Helium and neon are less dense than air; argon, krypton, xenon and radon are denser than air.
Carbon Dioxide is less denser than air.