Final answer:
Air, or wind, can be a source of energy because it has kinetic energy that wind turbines convert into electricity. Wind energy is renewable and constitutes a clean, emission-free source of power that contributes significantly to the energy market.
Step-by-step explanation:
The statement that best describes how air, or wind, can be a source of energy is that wind possesses kinetic energy that can be harnessed through wind turbines to generate electricity. Wind is created due to the movement of air as the atmosphere tries to equalize global temperatures, creating a flow of air with substantial kinetic energy. This kinetic energy can be converted into mechanical energy by the rotation of turbine blades and subsequently transformed into electrical energy through generators. Wind energy is considered a renewable resource because there is theoretically an infinite supply of it, making it a sustainable option for electricity generation.
Wind farms, composed of multiple wind turbines, are effective at capturing this energy and turning it into usable electricity. These turbines do not produce emissions and require little water, making them environmentally favorable. Additionally, wind power has been a significant contributor to the electrical generating capacity added in the United States, with wind turbines being installed in various regions across the country indicating its growing importance within the clean energy market.