Share this page!

Enter URL or ID to Unroll

You can paste full URL like: https://x.com/threadreaderapp/status/1644127596119195649
or just the ID like: 1644127596119195649

How to get URL link on X (Twitter) App

  1. On the Twitter thread, click on or icon on the bottom
  2. Click again on or Share Via icon
  3. Click on Copy Link to Tweet
  4. Paste it above and click "Unroll Thread"!
  5. More info at Twitter Help
Ben See Profile picture
@ClimateBen
Sep 18, 2021 • 5 tweets • 2 min read • Read on X
icymi

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…

• • •

Missing some Tweet in this thread? You can try to force a refresh
　

Keep Current with Ben See

Ben See Profile picture

Stay in touch and get notified when new unrolls are available from this author!

Read all threads

This Thread may be Removed Anytime!

PDF

Twitter may remove this content at anytime! Save it as PDF for later use!

Try unrolling a thread yourself!

how to unroll video
  1. Follow @ThreadReaderApp to mention us!

  2. From a Twitter thread mention us with a keyword "unroll"
@threadreaderapp unroll

Practice here first or read more on our help page!

More from @ClimateBen

Ben See Profile picture
Oct 12
60-75% of Earth's species risk sudden extinction in a few decades given:
* extreme population declines
* likely vulnerability of data deficient species
* pollution and habitat & wildlife destruction trends
* accelerating warming of 3/3.5°C in 2-6 decades

Most at risk?

Primates.
Percentage of species at risk of extinction (% with declining populations)

50% (61%) of birds
47% (up to 75%) of amphibians
40% (up to 70%) of plants
40% (up to 89%) of insects
37% (up to 75%) of mammals
28% (up to 63%) of reptiles
24% (up to 84%) of fishes
66% (93%) of primates
onlinelibrary.wiley.com/doi/10.1111/br…
Read 15 tweets
Ben See Profile picture
Oct 5
Conservative analysis reveals utterly horrific global warming of 1.75-2°C is likely set to hit within 4 to 12 years with truly catastrophic consequences for food systems.
Estimate of 1.44°C (20-year average) warming for 2015-34:

metoffice.gov.uk/about-us/news-…
Read 5 tweets
Ben See Profile picture
Sep 18
12-40% of species extinct is considered catastrophic. So many amphibian species (~50%), plant & bird species (~40-50%), insect & mammal species (~30-40%), and reptile & fish species (~25%) are currently seen as being at risk. 48% of species are in decline. How will humans cope?
1. under a pessimistic global warming scenario (~4°C increase), climate change alone might only cause the extinction of ~20–30% of extant species in the next ~50–100 years [41,42]. Taken together, these losses would be catastrophic, but very far from 75%.'
sciencedirect.com/science/articl…
2. 'Current projections of future extinction seem more consistent with ~12–40% species loss, which would be catastrophic but far from the 75% criterion used to argue for a 6th mass extinction.'

Some experts fear >50% at 3-4°C even with moderate emissions.
sciencedirect.com/science/articl…
Read 4 tweets
Ben See Profile picture
Sep 10
Earth's species will suffer 2-2.6°C and rising even in capitalism's most ambitious decarbonization scenario. Scientists anticipate unsurvivable 3-7°C, with geologic periods like the Miocene climatic optimum (MCO) seen as good analogues for our current 21st century climate hell.🧵 The multimethod, multitaxon pCO2 reconstruction presented here indicates that pCO2 was moderately elevated at ~450–550 ppm during the MCO. These results are somewhat higher than most previously published pCO2 records, which generally report pCO2 < 450 ppm (see Foster et al., 2017), but still considerably lower pCO2 than climate modeling requires to reproduce MCO temperatures (Goldner et al., 2014). This indicates that climate sensitivity must have been elevated during the MCO, leading to highly elevated temperatures at moderately elevated pCO2. With 415 ppm measured for the first time in sp...
1/The race is now on to improve our knowledge of the Earth system in order to understand whether.. moderate levels of pCO2 may.. cause a devastating..increase of up to 7°C in the (near?) future, and if so, take action to prevent it. agupubs.onlinelibrary.wiley.com/doi/10.1029/20… x.com/ClimateBen/sta…
2. The temperature regime reconstructed for most of the Miocene, ∼5°C–8°C above modern, is equivalent to projected future warming in about a century under unmitigated carbon emissions scenarios.. an important warm-climate analog..
agupubs.onlinelibrary.wiley.com/doi/full/10.10…
x.com/ClimateBen/sta…
Read 7 tweets
Ben See Profile picture
Aug 27
COLLAPSE/EXTINCTION: scientists fear global warming of 3.5°C, which wipes out 33-70% of species (IPCC AR4 2007, IPCC AR6 2022), will likely hit by the 2060s give or take a decade or two 🧵
1. IPCC scenario SSP3-7.0 shows 3.5°C by 2080 or from 2062 (not the worst-case scenario). Even a moderate emissions scenario can lead to 3.5°C this century (new research shows 2060s-80s possible).


Species extinct IPCC:
3.5C 40-70% 2007
3C 29%, 4C 39% 2022esd.copernicus.org/articles/12/25…
2. A new pre-print from highly respected climate scientists implies 3.5°C by 2065-77 at current rates of warming. The authors warn this rate could increase or decrease perhaps suggesting 3.5°C by around 2055-2087 rather like IPCC high emissions scenarios.
researchsquare.com/article/rs-607…
Read 5 tweets
Ben See Profile picture
Aug 25
BREAKING: scientists say Earth's major systems are undergoing abrupt changes — and soon we'll all feel them 🧵
1. 'prepare for a future of abrupt change.. choices made now will determine whether we face a future of worsening impacts and irreversible change or one of managed resilience to the changes already locked in.' phys.org/news/2025-08-s…
2. Society must now brace for catastrophic impacts.

Thread:
Read 7 tweets

Did Thread Reader help you today?

Support us! We are indie developers!

This site is made by just two indie developers on a laptop doing marketing, support and development! Read more about the story.

Become a Premium Member ($3/month or $30/year) and get exclusive features!

Become Premium

Don't want to be a Premium member but still want to support us?

Make a small donation by buying us coffee ($5) or help with server cost ($10)

Donate via Paypal

Or Donate anonymously using crypto!

Ethereum

0xfe58350B80634f60Fa6Dc149a72b4DFbc17D341E copy

Bitcoin

3ATGMxNzCUFzxpMCHL5sWSt4DVtS8UqXpi copy

Thank you for your support!

Follow Us!

Send Email!

:(