nothing
It is thin
The gases in the atmosphere
When Pluto is closer to the Sun in its orbit, the warmth from the Sun heats up the frozen ices of nitrogen, methane and carbon monoxide on Pluto's surface. These ices vaporize and form a temporary atmosphere. When Pluto moves farther from the Sun, the atmosphere freezes and falls back onto Pluto's surface.
Pluto has a very thin atmosphere.
Pluto's atmosphere is made up of several layers, including a thin nitrogen-rich atmosphere, an upper haze layer, and a lower troposphere where most of the weather activity occurs. Below the surface, Pluto likely has layers of rock and a subsurface ocean of water ice.
Nitrogen makes up about 79% of the atmosphere.
CO2 makes up approximately 0.03% of Earth's atmosphere
Pluto absolutely has an atmosphere. Pluto's atmosphere is composed of 90 percent Nitrogen and 10 percent of the more complex substances such as methane.
Pluto's minor gases include methane, carbon monoxide, and nitrogen. Its major gas is nitrogen, which makes up the majority of its thin atmosphere.
Nitrogen makes up 78% of the Earth's atmosphere. Oxygen makes up about 21%.
Nitrogen makes up about 80% of the Earth's atmosphere.
Pluto sometimes has a temporary thin atmosphere, but only during Pluto's Summer. Pluto entered Summer in 1989 and it will last until 2114.