propane i think...80
Hot air balloons typically use propane gas as a fuel source for the burner that heats the air inside the balloon envelope. The propane is burned to heat the air, which causes the balloon to rise.
Hot air balloons are now mostly used for leisure
Hot air balloons are typically filled with hot air, rather than a gas, in order to make them buoyant and rise in the air. The air inside the balloon is heated by a burner attached to the basket, which causes the balloon to lift off the ground.
Propane. This is what makes the flame that heats the air in the balloon.
because its lighter than most other elements which make up air and was easier to capture than helium
Helium is the most used gas for balloons; sometimes hot air and rarely hydrogen.
No, it is not. "Regular" air is used, and it is heated. Hot air is less dense than cooler air, and it will rise. If hot air is trapped in an envelope, it will give lift to the envelope and an attached payload.
Hot air balloons burn fossil fuels to produce the heat they need to fly. Anything which burns fuel must also release some pollutants. So yes, hot air balloons do pollute. But it should be noted that most burn propane which is a very clean fuel.
Hot air balloons use propane gas as fuel to heat the air inside the envelope, which causes the balloon to rise. The propane burner provides the necessary heat to keep the air inside the balloon hotter than the air outside.
Helium is used to inflate balloons because it is lighter than air and that makes the balloon float.
Helium is a gas used to inflate lighter than air balloons.
because it helps it fly in air