Save the trees

"At one time forests covered nearly 15 billion acres of land. But men have consumed and destroyed trees far more rapidly than the trees have been replaced by nature, with the result that approximately one-third of the original forests have disappeared. In most industrial countries wood is still being consumed more rapidly than it is being replaced by new growth--in Europe and America at a rate between 10 and 15 per cent faster than the rate of replacement."
~Harrison Brown, The Challenge of Man's Future, 1956, p. 128

Now, I need to see how those figures stack up today--this quote is 51 years old! But what an interesting bit of research it would be to see how this measures with today's rates of consumption and re-plantation.