Christian Science Monitor: Q: How much “old growth” forest is left in the United States, and is it all protected from logging at this point? – John Foye, via e-mail A: As crazy as it sounds, no one really knows how much old-growth forest is left in America, mainly because various agencies and scientists define it differently. Generally speaking, “old growth” refers to forests containing trees often hundreds, sometimes thousands, of years old. But even when there is agreement on a specific definition, …