Humans have caused 1.5 °C of long-term global warming according to new estimates

Re:Humans have caused 1.5 °C of long-term global warming acc... by Tade0 on Sunday November 17, 2024 @03:47PM (#42167089)

Considering that since 1988 world population went from a little over 5bln to 8bln, our output per capita rose by around 10%, which is not great, but also not terrible.

Meanwhile the number of infants globally peaked around 2013-2017 and according to revised estimates overall population will peak late this century reaching 10.4bln - largely in countries with a small carbon footprint anyway.

We're going to blow past that 2°C target and millions will die due to extreme weather, but I firmly believe life on Earth and our species will survive, especially now that the "business as usual" scenario is considered highly unlikely due to how differently e.g. China's coal usage changed compared to projections.

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Re:Humans have caused 1.5 °C of long-term global warming acc... by layer8 on Sunday November 17, 2024 @03:56PM (#42167164)

> I firmly believe life on Earth and our species will survive

Few people are doubting that. The issue is that

> millions will die due to extreme weather

and due to climate-related wars, and life in general will become less pleasant. Just breathing air with higher CO2 concentration already isn’t that great.

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Re:Humans have caused 1.5 °C of long-term global warming acc... by hartator on Sunday November 17, 2024 @04:08PM (#42167271)

> Just breathing air with higher CO2 concentration already isn’t that great.

Or less O2. I wonder if there any study that does show any impact already or these are still speculations?

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Re:Humans have caused 1.5 °C of long-term global warming acc... by Filligree on Sunday November 17, 2024 @04:16PM (#42167350)

There isn't less O2. Even if all plants on earth disappeared (and animals somehow survived that), it would take millions of years before there's any measurable impact on O2 concentrations.

Moreover, there's no physiological impact whatsoever until you drop several percent.

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Re:Humans have caused 1.5 °C of long-term global warming acc... by hartator on Sunday November 17, 2024 @04:33PM (#42167512)

O2 does decrease and is measurable: https://www.oxygenlevels.org/

I think this is a more marketable concern than CO2 as without O2 most know that you can’t live.

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Re:Humans have caused 1.5 °C of long-term global warming acc... by nradov on Monday November 18, 2024 @02:40AM (#42170534)

Those are meaningless changes. It's less than the effect of walking up a small hill in terms of inspired oxygen partial pressure.

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