The trees on my property tend to grow their branches downward, like this:
It looks to me like they're just crowded and reaching for some sunlight, but I'm starting to worry about their health and ours (e.g., if that massive oak branch falls on someone). So:
Assuming the downward branches are an attempt to find sunlight, how much can I prune them back without harming the tree?
What can I do to promote the long-term health of my trees generally?
If I'm wrong about the downward branches, then what is actually going on?