Not much.
They're fairly slow, and with little to no sideways control it's hard to aim for a certain place to land.
Hot air balloons are a slower form of transportation. For most people, they are beautiful to see when they are in the air.
Hot air is used for hot air balloons.
Hot air balloons are now mostly used for leisure
The most obvious are being used every day. Air transportation includes: Airplanes, Helicopters, Hot Air Balloons, Blimps, Rockets, Kites, Parachutes and Birds.
Ballooning is a form of transportation, men have gone around the globe in balloons. The problem is that balloons lack control and it is hard to plan with all certainty where a trip will culminate. Most hot air balloons are used for leisure and exhibitions.
Hydrogen is not used to inflate hot air balloons. Just regular air is used which is then heated to make the balloon more buoyant as hot air weighs less than cold air. Hence the name hot air balloons.
Hot air balloons were used for reconnaissance during the civil war.
Just regular air, which is heated. That's why they are called hot air balloons! The fuel gas used for heating the air is usually propane.
The most obvious are being used every day. Air transportation includes: Airplanes, Helicopters, Hot Air Balloons, Blimps, Rockets, Kites, Parachutes and Birds.
The first use of hot air balloons was in the American Civil War for surveillance of troop movements.
Hot air balloons use the fact that hot air rises as a way to make balloons fly. When the air inside the balloon is heated, it rises, and this creates lift which is used to make the balloon fly.
Hot air balloons were used to spy on the enemy. They were also used to communicate, send supplies, and drop bombs.