It states that, with each successive energy transfer or transformation in a system, less energy is available. That is, energy is degraded to lower-quality forms, or it dissipates and is lost, as it is used. When you drive a car, for example, the gas's chemical energy is degraded to kinetic energy and heat, dissipating, eventually, to space. The second law recognizes that disorder, or entropy, tends to increase in all-natural systems.