Knowing which species of pine you have and the time of year you first see symptoms can help you identify the problem.
Why are my pine trees turning brown? - Christmas Trees
Christmas tree: How to revive a droopy tree - 'this is very important
5 Easy, Realistic Ways to Upcycle Your Christmas Tree Needles — Compost and Cava
Norfolk Pine 101: How to Care for Norfolk Pines
How to Check Tree Health for Safety During Storms - Charlotte Magazine
Reasons For A Yellowing Norfolk Pine - What To Do For Yellow Or Browning Norfolk Pine Foliage
Why is my potted Christmas tree turning brown?
Potted Christmas Tree - Caring For Pot Grown Christmas Trees
Potted Christmas Tree - Caring For Pot Grown Christmas Trees
How to treat a pine tree turning brown - Quora
What to Do if Evergreen Trees Brown in Winter - Parade
Why Are My Norkfolk Pine's Branches Dry?
Christmas tree - Wikipedia
Giant pine turning brown above my house. : r/arborists