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There are impacts to the natural world, from
climate change.

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Warming a planet means 
shifting the climate zones of the planet. 

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And this is already observed to have 
happened. 

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In this animation from the Arbor Day 
Foundation, you can see 

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the hardiness zones have migrated northwards 
just in the last few decades. 

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If you're going to move these climate 
zones, 

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it's not so easy to move a forest. 

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This forest may suddenly find itself 

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in unfamiliar climate territory to which 
it's not suited. 

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And that could leave it vulnerable to 
collapse,

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or encroachment, or fire.

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Other aspects of the biota can 

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move quickly, such as insects can move 
basically instantaneously. 

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In the US, a

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particular kind of insect called the pine bark beetle

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is encroaching into 
the Rocky Mountain states. 

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It used to be kept in check by cold 

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temperatures in the winter, but

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things have been so warm that the bugs are 
killing 

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vast stretches of forest in the 
Rockies. 

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Climate zones on
mountains move to higher Elevations. 

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The rain forest in Australia and 
Queensland, 

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is located in the mountaintops, 

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climate zones which will disappear as 
climate changes. 

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These are the species and 
ecosystems that get hurt the most. 

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The ones that are basically chased 

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off the map by the changing climate 
zones. 

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Another example of that, is in the High 
Latitudes, 

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Where we're losing 

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the sea ice that supported 
the Polar bears. 

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The polar bears require sea ice as part of 
their life cycle, 

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and when the ice is gone, there's no place 
for them to go.