A birch tree can be ripe for chopping in 20-30 years.
But you wont believe how much firewood you get from one tree.
I own 5 hectares of forrest. It has enough birch trees ripe for chopping to heat my home for 5 winters. In that time enough birches will grow to the desirable size to cut them for another 5 winters and so on and so on...
Slovenia has 1.816.000 hectares of forests, about 58% of the entire country. Enough firewood to heat 1.000.000 homes (counting out the industry aplicable wood) per winter. In a country of 2.000.000 people we have enough to export.
Of course, lets be real. Wood burning only really works in rural areas and sub-urbs. One fammily houses. But its enough to shift oil and gas consumption from half the population.
And Texas or Spain would also be an exception here.
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