site banner
PaperclipPerfector  8d ago (text post)   2299 thread views

Small-Scale Question Sunday for December 21, 2025

Do you have a dumb question that you're kind of embarrassed to ask in the main thread? Is there something you're just not sure about?

This is your opportunity to ask questions. No question too simple or too silly.

Culture war topics are accepted, and proposals for a better intro post are appreciated.

1
Top Bottom Old Controversial Comments
Jump in the discussion.

No email address required.

How do you figure every port city will be underwater? Total sea level rise since the 19th century is estimated at 15-25 cm. It's a joke.

Heat and CO2 have resulted in greater agricultural productivity for our plants already,and it's only going to get better from here. Gigantic areas of canadian and russian tundra are going to slowly become available for crops and human habitation.

France has had cheap electricity thanks to its nuclear power plants for decades now.

The 19th century english and americans had access to cheap, high quality fossil fuels - why weren't they richer than us?

Apologies for the delay! I've been very busy with Christmas and the like - seeing family ranks a bit more highly on my priority list than the culture war.

How do you figure every port city will be underwater? Total sea level rise since the 19th century is estimated at 15-25 cm. It's a joke.

There's no real academic or scientific debate on this subject - I'm not saying that we're going to have to start building Noah's Ark tomorrow, but the projected sea level rises over the next few hundred years are going to do this with ease. Complicated systems like the global climate are also vulnerable to sudden shocks - if something causes a large glacier or ice-shelf to drop into the ocean we could be seeing those levels rise faster than predicted. Again, this won't be a problem for us - but it will have our descendants cursing our names in the future.

Heat and CO2 have resulted in greater agricultural productivity for our plants already,and it's only going to get better from here. Gigantic areas of canadian and russian tundra are going to slowly become available for crops and human habitation.

You're right - Russia is a big winner of climate change. But what you're missing is that the increase in global temperatures is also going to drive a massive increase in adverse weather events. While the equitable climate on the other side of climate change is going to be very nice for a lot of people, the transition period is going to be rather nasty. Existing farming infrastructure will have to be moved and there are going to be a wide variety of extreme storms, floods and other natural disasters.

France has had cheap electricity thanks to its nuclear power plants for decades now.

France had to bail their nuclear power system out because it wasn't economical - and up til now they got their uranium for a 50th of the price thanks to their colonial holdings in Africa. If you scroll back up I've actually had this conversation before, in this very thread even.

The 19th century english and americans had access to cheap, high quality fossil fuels - why weren't they richer than us?

Do you think this is an actual argument? "If a doctor earns more money than a janitor, why is this doctor fresh out of medical school with tons of debt poorer than a janitor who is retiring after saving and investing for their entire life? Checkmate, liberals." I am legitimately struggling to understand the argument you're making here. Ultimately, they were richer in the sense that they had potential to do a lot more than we did. Personally I think going to the moon again would have been a better use of those fossil fuels than vastly inflating the American population then rendering a vast majority of that population clinically obese - a society that did NOT make that choice would actually be unironically richer in my opinion.

CO2 have resulted in greater agricultural productivity for our plants already

do you have numbers for it? Is it greater at high altitudes where one could expect CO2 increase produce larger impact in %?

do you have numbers for it?

Since the industrial revolution we went from 290 ppm CO2 to 424 ppm.

From 2002 to 2014, plants appear to have gone into overdrive, starting to pull more CO2 out of the air than they have done before.[33] The result was that the rate at which CO2 accumulates in the atmosphere did not increase during this time period, although previously, it had grown considerably in concert with growing greenhouse gas emissions.[33]

A 1993 review of scientific greenhouse studies found that a doubling of CO2 concentration would stimulate the growth of 156 different plant species by an average of 37%.

A 2005 review of 12 experiments at 475–600 ppm showed an average gain of 17% in crop yield, with legumes typically showing a greater response than other species and C4 plants generally showing less.

https://en.wikipedia.org/wiki/CO2_fertilization_effect#Observations_and_trends

We report a strong enhancement of photosynthesis across the observational network (9.1 gC m−2 year−2) and show that the CFE (CO2 Fertilization Effect) is responsible for 44% of the gross primary production (GPP) enhancement since the 2000s, with additional contributions primarily from warming (28%) .

https://pmc.ncbi.nlm.nih.gov/articles/PMC8915860/

Here we use three long-term satellite leaf area index (LAI) records and ten global ecosystem models to investigate four key drivers of LAI trends during 1982–2009. We show a persistent and widespread increase of growing season integrated LAI (greening) over 25% to 50% of the global vegetated area, whereas less than 4% of the globe shows decreasing LAI (browning). Factorial simulations with multiple global ecosystem models suggest that CO2 fertilization effects explain 70% of the observed greening trend, followed by nitrogen deposition (9%), climate change (8%) and land cover change (LCC) (4%). CO2 fertilization effects explain most of the greening trends in the tropics, whereas climate change resulted in greening of the high latitudes and the Tibetan Plateau.

https://www.nature.com/articles/nclimate3004

Is it greater at high altitudes where one could expect CO2 increase produce larger impact in %?

I don‘t think so. According to this map, the CO2 fertilization effect is stronger at the equator, where there are more plants, more primary production already (rainforest) . Then less as you get further away from the equator. The quote above suggests plants at high latitudes need warmth more than CO2.

thanks

i meant altitude, not lattitude (-:

What is this place?

This website is a place for people who want to move past shady thinking and test their ideas in a court of people who don't all share the same biases. Our goal is to optimize for light, not heat; this is a group effort, and all commentators are asked to do their part.

The weekly Culture War threads host the most controversial topics and are the most visible aspect of The Motte. However, many other topics are appropriate here. We encourage people to post anything related to science, politics, or philosophy; if in doubt, post!

Check out The Vault for an archive of old quality posts. You are encouraged to crosspost these elsewhere.


Why are you called The Motte?

A motte is a stone keep on a raised earthwork common in early medieval fortifications. More pertinently, it's an element in a rhetorical move called a "Motte-and-Bailey", originally identified by philosopher Nicholas Shackel. It describes the tendency in discourse for people to move from a controversial but high value claim to a defensible but less exciting one upon any resistance to the former. He likens this to the medieval fortification, where a desirable land (the bailey) is abandoned when in danger for the more easily defended motte. In Shackel's words, "The Motte represents the defensible but undesired propositions to which one retreats when hard pressed."

On The Motte, always attempt to remain inside your defensible territory, even if you are not being pressed.


New post guidelines

If you're posting something that isn't related to the culture war, we encourage you to post a thread for it. A submission statement is highly appreciated, but isn't necessary for text posts or links to largely-text posts such as blogs or news articles; if we're unsure of the value of your post, we might remove it until you add a submission statement. A submission statement is required for non-text sources (videos, podcasts, images).

Culture war posts go in the culture war thread; all links must either include a submission statement or significant commentary. Bare links without those will be removed.

If in doubt, please post it!


Rules


Recommended Posts And Communities

Recommended Realtime Chats