Final answer:
Wind energy uses moving air and doesn't pollute, while biomass energy, using plant matter, emits carbon when burned but can be carbon neutral if sourced from waste.
Step-by-step explanation:
The energy source that uses moving air and does not pollute the atmosphere is wind energy. The energy source that uses dead plant matter is biomass energy, and burning it releases carbon emissions into the atmosphere. Biomass energy can be sustainably sourced from waste material, making it a carbon neutral option as it recycles carbon within the carbon cycle. However, unsustainable harvesting of wood for biomass can lead to deforestation and increased carbon emissions. In contrast, wind energy harnesses natural air currents to generate electricity without directly emitting greenhouse gases.