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164 points bikenaga | 1 comments | | HN request time: 0.34s | source
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htamas ◴[] No.45399285[source]
The Amazon forest is unique in many ways but most importantly because unlike other forests, it CANNOT grow back. The reason for this is that it is a leftover from when the planet was covered in rainforests because it was a lot warmer and wetter in the Eocene epoch. The forest is sustained by the rain it creates from itself. Once the trees are gone, the water will be gone. [1] We also have reasons to think this self-sustaining climate is going to collapse soon [2]

So far the best way to protect it I have found is through the Rainforest Trust [3] which is a foundation that's trying to purchase and protect parts of the rainforests that companies would otherwise cut or burn down for agricultural use.

[1]https://youtu.be/hb3b-A6QAc8

[2]https://www.nasa.gov/earth-and-climate/human-activities-are-...

[3]https://www.rainforesttrust.org

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woah ◴[] No.45399309[source]
> The reason for this is that it is a leftover from when the planet was covered in rainforests because it was a lot warmer and wetter in the Eocene epoch.

Won't it get much warmer and wetter once global warming hits, allowing the rainforest to grow back?

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blueflow ◴[] No.45399592[source]
Eocene temperatures: 6-15 kelvin above current. Would take another century or two of coal-burning to reach.
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TSiege ◴[] No.45399634[source]
We are already at Eocene levels of CO2 it’s just that our climate hasn’t caught up yet
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blueflow ◴[] No.45403049[source]
I think that's wrong, Eocene ended when levels had fallen to roughly 600-700 ppm? And we are at 480 ppm now.
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1. TSiege ◴[] No.45531736[source]
You are correct. I meant the Miocene where towards the end CO2 was ~500 ppm which we are over with CO2e.