- Solar and Wind power are cheap and are infinitely scalable on both small and large scales.
- Public transport massively reduces energy requirements for transportation, and scales from bullet trains to light rail. Bike paths combined with ebikes can be used for smaller scales.
- Vegan diets massively reduce emissions and energy requirements to produce calories for a population
- Iron-air batteries are right now viable as an alternative to fossil fuel powered container ships. They are viable at large scales. For small scale between short distances, sailboats are still quite viable.
- High density urban planning done by the Edenicity plan reduces suburban sprawl and massively reduces energy consumption by allowing for an urban area to be energy and food self sufficient. This concept scales to both small villages or large cities.
The tech is there. The only thing stopping us is a lack of political will due to capitalism resulting in oligarchs who have captured the political system, and a lack of public awareness of alternative ways of life due to poor education and propaganda.
A properly informed public that understands the extreme dangers of climate change, oligarchic capitalism, and the viability of changing things with collective power would allow us to use these existing technologies and prevent the devastation we're headed toward.
I'm aware, but I was addressing that one point at the end of their post about us not having sustainable technology, which I consider distinct from tech that sequesters existing emissions. As in, had we structured our societies with that other tech, it would've been fairly sustainable.
For sequestering carbon, I'd read a bit about growing mass amounts of some sort of seaweed or grass in shallow areas being somewhat promising, though ultimately I think we're locked in for some extreme change regardless. My recommendations of sustainable tech would only limit the ceiling we reach in the future.