"The flight of balloon is based on one basic scientific principle that says warmer air rises in cooler air. Although its principle looks much old and simple for huge aircraft, each components of the balloon are surprisingly optimized to contribute to successful flight. The basket carries and protects its passengers and the burner system. The burner system positioned in the basket produces the heated air to the envelope. The envelope holds the heated air and makes it the stable motive force. Therefore, the balloons fly again."
This paragraph contains too many errors, I think.
How should I make this more readable?