Can we control the movement of hot air balloons?

Hot air balloons rises up because of the fundamental property of the hot air filled in them; air when heated becomes lighter (less denser) than the surrounding cold air. It is driven by breeze and so there is no control over the flight path. Moving up is controlled by heating the air with the help of burners uspended beneath it. As a result, the balloon rises to find its equilibrium with the surrounding air. Coming down is controlled by releasing the hot air from the balloon. Hot air balloon should be operated after studying the weather and making sure there are no strong winds.