Final answer:
Energy from firewood is considered renewable because it is derived from trees, which can regrow, making it a form of biomass that is ultimately powered by the sun. Firewood, when used sustainably, does not deplete resources. However, unsustainably harvested wood can lead to environmental issues like deforestation and air pollution.
Step-by-step explanation:
Why is Energy from Firewood Called Renewable?
Energy from firewood is considered renewable because it comes from trees, which can regrow to replace themselves after being harvested. This process can be sustainable if the wood is harvested at a rate that does not exceed the growth rate of new trees. The sun provides energy for the growth of trees, making biomass an indirect form of solar energy, which is considered inexhaustible. However, using firewood as an energy source does have environmental impacts. Wood smoke contains pollutants like carbon monoxide and particulate matter, which can be harmful to health and the environment. Additionally, if trees are harvested unsustainably, it can lead to deforestation and the loss of ecosystems.
Renewable energy sources are advantageous because they can be replenished naturally and can allow for localised and decentralised control over power, with less environmental impact than fossil fuels. With proper management and sustainable harvesting practices, biomass, including firewood, can be considered a source of renewable energy that can contribute to meeting current and future energy needs.