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
Hot air ballooning Lewis. The song "Get It Up" from the 1983 New England release Walking Wild is about hot air ballooning. The song "Let Everything Go" by Phil Keaggy (1981) is about hot air ballooning. In "The Wizard of Oz" (1939), the wizard leaves the Emerald City in a gas balloon, not a hot air balloon. In "Around the World in Eighty Days" a gas balloon, not a hot air balloon, (featured on the movie poster) is used to cross the Pyrenees. In "Enduring Love" (2004), a hot air balloon is involved in a tragic accident during the opening scene. In "The