Wood,

From the 1890's until the mid 1900's, wood was the primary fuel for residential, commercial, and transportation uses. For some time after, alternative fuels, such as fossil fuel were used to replace the slowly, diminishing forests. In Canada and the U.S., wood is used as fuel in two distinct applications. Wood wastes from the forest products industry, and many homeowners use wood as a primary or secondary source of home heating. In recent studies, …

…sustainable rate and in properly designed and controlled equipment. As a renewable source of energy, wood is very important because it represents stored solar energy. Many other forms of solar energy such as photovoltaic cells and wind turbines are only capable of providing useful energy when the sun is shining, or the wind is blowing. For the reasons, wood has the potential to be an important component of sustainable energy future based on renewable energy.