How does height above sea level affect climate?

It effects the climate because above sea level there's less oxygen, more colder, and if your up there, you'll get puffy because there's lots of water going inside the cells, the smallest living organ. Hope I got it right. If I did, your welcome.

There is less air at higher altitudes. Because air traps heat, there is thus less heat. This is why people who climb high mountains need both warm clothing and oxygen tanks.