the.com/treeline
the altitude where trees throw in the towel and the mountain wins.
temperature limitTrees stop where summers average below 10°C.
krummholzLast trees grow twisted, stunted, hugging the ground.
rising higherWarming climate is pushing treelines steadily upslope.
equator effectTreelines climb highest near the tropics, around 4000 meters.
not a lineIt's actually a fuzzy transition zone, not sharp.