Hot air balloon sea level, and humidity of the air surrounding. On a warm day, a balloon cannot lift as much as on a cool day, because the temperature required for launch will exceed the maximum sustainable for nylon envelope fabric. Also, in the lower atmosphere, the lift provided by a hot air balloon decreases about 3% for each 1,000 meters (1% per 1,000 ft) of altitude gained. Standard hot air balloons are known as Montgolfier balloons and rely solely on the buoyancy of hot air provided by the burner and contained by the envelope. This style of balloon was developed by the
Air Balloon (song) she had lost agency to her label, Parlophone. In 2018, Allen described "Air Balloon" as her least favourite song, and agreed with a fan who suggested that it "stunk of label pressure as a lead single". "Air Balloon" is described by "Billboard" as "more of a loopy lullaby than a slice of social commentary", with a nonchalant Allen singing, "Come meet me in the sky, I'll be waiting for you/And we can't hear what they say/Up in my air balloon, air balloon, air balloon." The song gets its toy piano arrangement, creaseless beat and offbeat Kurt Cobain shout-out partially from