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Kathleen McCroskey's avatar

We are now over 430 ppm of CO2. Where does this end? If all forests were "managed" by humans, there would be no old-growth forests and all the biodiversity that goes with that. If you stand there thinking the forest is in your way, no, you are. Tell me that date when all this ends. There must be a date.

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Chris Lang's avatar

Two problems with your comment "If all forests were 'managed' by humans, there would be no old-growth forests and all the biodiversity that goes with that."

First, the Amazon rainforest has been managed by Indigenous Peoples for thousands of years. See this 2024 report by Rainforest Foundation US: "The Ancestral Forest: How Indigenous Peoples Transformed the Amazon into a Vast Garden" (https://rainforestfoundation.org/the-ancestral-forest-how-indigenous-peoples-transformed-the-amazon-into-a-vast-garden/).

Second, this recent research looks at what happens to biodiversity in rural areas in Japan where populations have fallen: "Biodiversity change under human depopulation in Japan" (https://www.nature.com/articles/s41893-025-01578-w).

The decline in population in rural Japan is not leading to ecosystems recovering and biodiversity increasing. As populations fall, urban sprawl moves in (even in towns where the population is falling), farmland is either abandoned or intensified, and biodiversity falls. When people move out, traditional management systems die out.

It turns out that biodiversity needs humans - providing they are carrying out low-impact, sustainable practices and not just trashing the place.

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