'Scott Green' - I have an associate named Matt Green - but that's by the by. We don't have a lifetime to grow trees. Greenhouse warming is in a runaway phase, and obviously this is being suppressed to avoid panic, but it's what's actually happening. The example shown of a cankered tree was so badly infected that felling was the only alternative if there was a possibility of anyone walking beneath it. If they're just lightly diseased then they can be pollarded and this would be a better alternative than a clear fell. The DEFRA guidelines are probably to clear trees that are infected in the hope of checking the spread of canker. There's actually - maybe - worse tree felling going on in every town and city by the parks departments, who are only trained in chainsawing and not in arboriculture - which is in a rapidly shrinking skillbase situation.