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26 Sep, 5 tweets, 2 min read
1/ 'Insects do not appear to have ever suffered a sudden mass extinction. If the current biodiversity crisis extinguishes diverse higher-level clades, then perhaps humans will have caused insects’ first true mass extinction.' 🧵academic.oup.com/aesa/article/1…
2/ 'However, at present, there are no indications that we are anywhere near a crisis of this severity.'

Really?

What about heading for 2.5°C-5°C of global warming within decades in the context of major eosystems collapsing during a mass extinction event?academic.oup.com/aesa/article/1…
3/ 252 million years ago: the Permian-Triassic extinction.

'The cataclysm was the single worst event life on Earth has ever experienced.. Of the five mass extinctions, the Permian-Triassic is the only one that wiped out large numbers of insect species.'nationalgeographic.com/science/articl…
4/ A third of insect species face extinction and over two-fifths are in decline.

Thread:

5/ "Holy crap".

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More from @ClimateBen

Ben See Profile picture
26 Sep
Did you know state-corporate media are completely ignoring this Aug 2021 peer-reviewed article showing that unless we slow down today's abrupt climate change we may expect a mass extinction equal to the worst in Earth's history within a matter of decades? nature.com/articles/s4146…
'5.2 °C.. at present rates of increase would likely result in mass extinction comparable to that of the major Phanerozoic events, even without other, non-climatic anthropogenic impacts'
nature.com/articles/s4146…

WMO, 2020: we're heading for 3°C-5°C by 2090s.public.wmo.int/en/media/press…
'Given the rapid pace of change we've set in motion and without arresting or at least slowing down those changes the record shows that we can expect massive extinctions in the natural world equal to the worst in Earth's history.'
skepticalscience.com/news.php?n=5151
5C?dw.com/en/domino-effe…
Read 4 tweets
Ben See Profile picture
26 Sep
We'll be approaching 450ppm of CO2 by 2029 which corresponds to 2-4°C of global warming, the end of human agriculture as we know it, and the worst mass extinction in 500 million years, and media, politicians & corporations want us to join them to discuss the role of fossil fuels.
1. See thread:

2. "Global warming of 2°C would leave the Earth warmer than it has been in millions of years, a disruption of climate conditions that have been stable for longer than the history of human agriculture.

skepticalscience.com/climate-sensit…
Read 5 tweets
Ben See Profile picture
18 Sep
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…
Read 4 tweets
Ben See Profile picture
18 Sep
BREAKING: the UN has indicated that with today's plans for economic growth Earth's species will likely suffer profoundly catastrophic global heating of somewhere between 1.65 and 2 degrees Celsius by the 2030s
Where are the appropriate headlines?

There won't ever be any, not in state-corporate media anyway.

Extinction is driven by the whole global growth economy of industrial agriculture, logging, road-building, mining, war, etc

2.5-3C by the 2050s?

Thread:
What happens at 2°C?

100s of billions of tonnes of CO2 will likely be released from soils..

Read 8 tweets
Ben See Profile picture
17 Sep
new peer-reviewed science: a temperature increase of 5.2 °C above the pre-industrial level at present rates of increase would likely result in mass extinction comparable to that of the major Phanerozoic events, even without other, non-climatic anthropogenic impacts

journalists:
1.
We're heading for somewhere between 2.5 °C and 6 °C with collapsing rainforests and Arctic sea ice destruction within decades on the current economic growth pathway.

The implications are staggering.

But guess what? Corporate mass media remain silent.nature.com/articles/s4146…
2.
The biosphere is being smashed by industrial agriculture, logging, road building, mining, pollution - the global growth economy.

We're currently heading for 2°C-3°C within a few decades.

Which/How many species might survive such extreme conditions?
Read 4 tweets
Ben See Profile picture
17 Sep
Worth knowing:

Economic growth can only offer, via deeply implausible future scenarios, an horrific 1.9°C-2.4°C future.

And if best estimates are wrong, it's 2.5°C-5.7°C climate hell.

Only postgrowth emergency action could aim for (still disastrous) 1.5°C-1.8°C.

A thread..🧵
1.
'long-term net-zero targets that have robust plans for reducing emissions by 2030 would reduce the uncertainty in temperatures beyond this year, and could limit heating to 1.9-2.0°C.'

* 'could' *

The headline is misleading: 1.5-1.8°C is not in reach. phys.org/news/2021-09-c…
2.
Net Zero 2050? It's a sham.

* 2.0–2.4°C utter calamity even if national emission targets are fully implemented

*  2.4–2.9°C (pledges submitted to the Paris Agreement)

* 2.7–3.5°C (currently implemented policies)

phys.org/news/2021-09-c…

* 'window' *nature.com/articles/s4155…
Read 5 tweets

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