[burnt-resistor]

PSA: In long-term fire abstinent areas, old growth trees can be saved from excessive scorching in fires by preventatively clearing built-up debris (combustible fuel) under the canopy and beside the trunk. Shovel and/or rake.

[bell-cot]

I've worked in some rather dense undergrowth and forest debris, but not done this particular sort of forest works. Still...

> Shovel and/or rake.

...multiplied by how many man-hours it takes per tree, by how many such trees per acre, by 640 acres per square mile, by (Google AI estimate) 100,000 square miles of such forest in Canada alone.