Some of the energies on the bus are chemical and mechanical. The chemical energy is from the gasoline burning and the mechanical energy from the car moving and stopping. The chemical energy comes form the burning of gas in the gas tank, then the chemical energy from the gas gets converted into mechanical in the engine which makes the bus move. During the energy conversion energy is converted into heat energy as well.
In this futuristic city, the buildings are powered by the sun to create electricity. The solar energy from the sun is converted into electricity by solar panels. The electrical energy from the solar panels the house and converts it into different energies around the house, like light, sound, and heat. For an example, a light bulb converts the electricity.