Collecting firewood for heating purposes is legal in Arizona on public lands, but there are pros and cons to consider. The availability of firewood depends on the location and season, with some areas having restrictions on gathering due to fire danger or protected species. In addition, the cost of collecting firewood includes the time and effort to gather, split, and transport the wood, as well as any permits or fees required. However, using firewood for heating can be a sustainable and renewable source of energy, reducing reliance on fossil fuels and electricity. It is important to follow guidelines for responsible firewood collection, such as avoiding live trees and leaving no trace, to minimize the impact on the environment.