1. the curve from sperm-decline meta-analysis predicts that by 2045 median sperm counts will reach zero (because of chemicals in plastics) with no evidence the trend is tapering off
2. by 2045 global warming of >2°C may subject humans to thermal infertility
We can act.🧵
1.
We can act on this:
'If you follow the curve from the 2017 sperm-decline meta-analysis, it predicts that by 2045 we will have a median sperm count of zero. It is speculative to extrapolate, but there is also ft no evidence that it is tapering off.'dumptheguardian.com/society/2021/m…
2.
'Even species thought to roam far away from these sources of pollution are suffering from chemical contamination. A female killer whale.. was found to be one of the most contaminated biological specimens ever reported. Scientists say she never calved.'theconversation.com/male-fertility…
3.
'research suggests males of some species can become infertile even at less extreme temperatures [2-2.25C?]
Whether our findings extrapolate to other species, including mammals such as humans, is not yet clear. It’s certainly possible, given evidence..'theconversation.com/fly-infertilit…
4. More on chemicals and 'Western' sperm counts:
racist, sexist, and Eurocentric ideas 'can get embedded in the categories that scientists use to analyze data'
research needs to be 'designed, executed, and communicated by people with varied perspectives'.slate.com/technology/202…
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BREAKING: mass media stay silent as climate scientists all agree economic growth means Earth's species face the threat of dire 1.75- 2°C of global warming by the 2030s 🧵
1. Conservative estimates imply threat of >1.7°C by the 2030s.
James Hansen warns of 2°C.
'This high rate of warming is caused by a combination of greenhouse gas emissions being close to an all-time high and a reduction in the cooling impacts of aerosols'carbonbrief.org/guest-post-tra…
2. Conservative projections show 2°C as early as 2037. Species like humans reach limits of adaptation at this point. (Tropical ecosystems wrecked at 1.5°C.)
Change this Extinction Economy now to protect species and everyone now while it's still too late. carbonbrief.org/analysis-what-…
2. 'Planetary boundaries represent thresholds in major Earth system processes that are sensitive to human activity and control global-scale habitability and stability
critical oxygen thresholds are being approached at rates comparable to other.. processes'
An amazing news story totally ignored by state-corporate media: according to even the most conservative and optimistic consensus assumptions there had to be 'immediate action' years ago at the very latest with emissions peaking and falling by now to avoid utterly catastrophic 2C.
BREAKING: scientists warn we're beginning to feel the effects of a geologically instantaneous 21st century shift into extreme and unsurvivable conditions 🧵
1. 'We are starting to feel the effects of transitioning to a hothouse climate (ΔT +4-5 °C) in a geological instant'
The global change happening now is potentially like the Permian extinction which occurred in just a few centuries.
2. "In my view it is impossible to survive that sort of change (4°C by 2100). That is beyond human physiology. But that is the trajectory we are on now.. No matter what we do with all the whiz-bang technology.. physiologically we cant survive that."
Even establishment climate scientists who organise consensus views (and often downplay catastrophe) show we can anticipate 2.1°C by (2035- ) 2050 at which point impacts become too severe to manage.