solarpunk memes

2918 readers

403 users here now

For when you need a laugh!

The definition of a "meme" here is intentionally pretty loose. Images, screenshots, and the like are welcome!

But, keep it lighthearted and/or within our server's ideals.

Posts and comments that are hateful, trolling, inciting, and/or overly negative will be removed at the moderators' discretion.

Please follow all slrpnk.net rules and community guidelines

Have fun!

founded 2 years ago

MODERATORS

[email protected]

841

I refuse defeatism (slrpnk.net)

submitted 1 month ago by [email protected] to c/[email protected]

138 comments fedilink hide all child comments

you are viewing a single comment's thread
view the rest of the comments

[–] [email protected] 4 points 1 month ago* (last edited 1 month ago) (1 children)

Using solar panels to power artificial lighting so you can vertically stack farms directly inside cities doesn't make any sense from a sustainability perspective.

But greenhouses in the suburbs that are tied into the city's thermal grid and seasonal thermal energy store is the future of agriculture IMO.

By enclosing fields in greenhouses you decrease the land, water, pesticide, and fertilizer requirements, while also eliminating fertilizer runoff and the possibility of soil depletion from tilling. By tying a greenhouse into a thermal grid the greenhouse can act as a solar thermal collector in the summer while maybe even condensing the water that evaporates through the plants for reuse. Then you can use that same heat to heat homes during the winter or extend the growing season in the greenhouse even further.

https://www.renewableenergymagazine.com/storage/world-s-largest-thermal-energy-storage-to-20240409

https://www.dlsc.ca/

https://ag.umass.edu/greenhouse-floriculture/fact-sheets/heat-storage-for-greenhouses

https://earthobservatory.nasa.gov/images/152874/a-greenhouse-boom-in-china

https://earthobservatory.nasa.gov/images/150070/almerias-sea-of-greenhouses

https://www.washingtonpost.com/business/interactive/2022/netherlands-agriculture-technology/ (Yes I know they use artificial lighting in a lot of these, and yes I know a lot of the value of their agricultural exports comes from flowers, but the point is it's another example of large scale greenhouse use. Also they do still produce quite a bit of food in a small area, in addition to the flowers.)

[–] [email protected] 1 points 1 month ago* (last edited 1 month ago)

Oh I fully agree that greenhouses have a role to play in food production. But that’s not typically what’s meant by indoor farming. That’s a separate but related concept.

That said, you may be slightly overstating the benefits here. Greenhouses can actually be very vulnerable to pests and diseases due to the high humidity, year-round warmth, and lack of natural predators. In theory they’re isolated but in practice it’s very likely some organism you don’t want will sneak in somehow. Pollination can also be a challenge for crops that need that.

I think these challenges can be overcome but there’s a lot of work to be done on them still.