![The shifting states of alpine treelines in Canada [2018]](https://images.squarespace-cdn.com/content/v1/5a1f230a6957da4aa04a790c/1523634651925-LO3EQQ9T77K9MBS0UYWT/Screen+Shot+2018-04-13+at+9.50.13+AM.png)
What does climate change have to do with treelines shifting to higher and higher altitudes? This piece from Carissa D. Brown explores our diverse treelines across Canada - what keeps them alive in certain locations and what facilitates, slows down or prevents their expansion.
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