There just aren't enough trees in Europe to power the industrial revolution, even with improved forestry techniques. There are too many people and too great a demand to continue to supply Europe's growing population and industry with wood. The switch to coal is probably what saved Europe from being deforested completely. Improved forestry could hold off the situation for a while but soon Britain is going to be importing huge quantities of charcoal from the US, Canada, and elsewhere, most likely the Baltic. British industry is going to suffer and securing supplies of charcoal is going to become a major concern for the empires of Europe. In OTL by 1880 the British iron industry alone was using seven million tons of coke a year and that doesn't include any other uses.