alt Hacker News>A couple years ago, I would have expected some kind of awakening with global efforts, but the opposite is the case.
The only thing we can do is slightly tweak the exponential adoption curve of solar, it's already here, already the cheapest option, already growing exponentially. We're right in the meaty part of the growth phase of solar and "moral" adoption pushes really don't have much to do with growth any more.
And also there are positives, CO2 is a potent fertilizer and there is plenty of land area which is uninhabitable and unsuitable for farmland which is going to boom with population and agriculture.
We're up for a century of change and migration and people need to change their tune from "oh no!" to "what's next?"
What's next is a lot of migration to the likes of Canada and Siberia and perhaps some active geoengineering building up the new locations around the globe for rainforests.
You have to let go of the past and embrace the future because crying about losing the Earth as it was 200 years ago will get you exactly nowhere.
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That new land has thin, acidic, waterlogged soil with few nutrients, is unstable and prone to collapse (see thermokarst), with photoperiods not suited for what those crops need. What's next is a world of hurt, especially if approached with techno-optimist myopia.
In the global share of primary energy solar is this very small player (less the hydro, much less then coal, or natural gas, or oil), data from 2024.
https://ourworldindata.org/energy-production-consumption
How much does the increase solar production decrease world-wide CO2 emmisions? Because CO2 emissions in 2025 were still increasing. I see that in many growing countries solar power is not seen as a replacement for fossil power, but as an addition to fossil power.
https://www.iea.org/reports/global-energy-review-2026/co2-em...
There are many places where the photosynthesis is not limited in CO2 amounts, but in amounts of other elements, like iron (about one third of the surface ocean), phosphorus (tropical rainforests).
https://www.us-ocb.org/microbial-iron-limitation-otz/
https://www.jircas.go.jp/en/release/2022/press202218
Warming of Siberia could increase methane leakage, which could increase global warming and then increase in methane leakage, the “methane time bomb”
https://www.smithsonianmag.com/smart-news/ticking-timebomb-s...
In the Earths history, we know of periods of emission of large magnitudes of CO2. One of them is Permian–Triassic extinction event (level of atmospheric carbon dioxide rose from around 400 ppm to 2,500 ppm), extinction of 57% of biological families, 62% of genera, 81% of marine species, and 70% of terrestrial vertebrate species.
https://en.wikipedia.org/wiki/Permian%E2%80%93Triassic_extin...
Lets hope we don't reproduce the PT event.