Abandoned Tori Gate found in Japanese Tunnel

For example outside of a building on campus there is a pipe that drips water from the side of the building and a small drainage basin full of stones, and near the drip from the pipe there grows a Virginia Dayflower, which likes to grow only in the stony areas of a creekbed that the water rises to cover rarely, or in gullies on a mountain side where rain rushes down sometimes

In many places bricks or stonework accidentally creates the perfect conditions for a type of moss which somehow ends up there, and people are like "Wow, what a lovely moss covered wall..."

I feel that with deeper knowledge of the plants, we could create buildings much greener and lusher and full of life, and even the urban areas would flourish with plants more specifically adapted to a place very similar to the artificially created place

In many cases they aren't already flourishing simply because the seeds have a hard time finding their way from the wild places into the city or town...especially since so many cities are surrounded with the dreaded SUBURB! Which can be worse...

For example drainage ditches in my home could be full of Lanceleaf Frogfruit and Soft Rushes and Woolgrass and Sedges of many kinds

what exists in terms of community developed sustainable technology

but like any revolutionary social movement it requires active involvement to achieve the change you want to see. Here are some handy resources for getting more involved:

Food Not Lawns - project to help communities feed themselves without capitalism

Food Not Bombs - same idea as above but less emphasis on growing food

The Buy Nothing Project - community resource pooling to combat consumerism

Demand Utopia - Rojava solidarity & social ecology activism - speaking of which, The Internationalist Commune of Rojava have their Make Rojava Green Again project.

Also, if you want your solarpunk social media then start looking to the decentralised non corporate sunbeam city mastodon instance (blend of tumblr and twitter without your data being sold) where you’ll find shit tonnes of information on making food, growing things, building sustainable technology yourself etc being shared - like this $3 DIY solarpowered USB charger or this $30 wind turbine made largely from salvaged parts.

In terms of building online infrastructure to actively combat capitalism, using and helping to develop open-source, community run software & websites like the sunbeam city mastodon instance should be a priority. This is a good alternative to google for searching.

In terms of building real world solarpunk infrastructure as resistance to actively combat capitalism, the organisations linked above are honestly invaluable - especially Food Not Bombs. I’d also add the Industrial Workers of the World (a democratic workers’ union for anyone in the world without hiring/firing power) as well as tenants’ unions - like ACORN in the UK. Finally, find or start a community garden.