Lower conifer branches are shade intolerant and self-pruning. Our lodge pole pine in particular. If anything, harvesting those branches diverts the carbon production to the upper part of the trees. Those branches can't do photosynthesis for squat so they wind up as net respiration carbon sinks.
Bigger growth rings higher up, a more cylindrical mainstem. Nice to build with.
Sit very close to the little fire to smell like old moose hide. Keeps the bugs away.
Recommended educational films? Take a long, hard look through the catalog from the National Film Board of Canada. They developed quite a reputation for making documentaries of our First Nations activities.
Get into the various subject segments in the west coast "Carving On The Edge" festival. Everything from 60' ocean going, whale hunting cedar log boats and smaller.
It's all on YT now, the Festival was broadcast by ZOOM. So for me, so far away, it was really exciting to participate.
Backed by at least 15,000 years here, the paleo/Neolithic practices of our First Nations happen nearly every day.