The "radical" solutions are not just throwing more technology at the problems. That's how we got ourselves into this mess in the first place.
The solution is to stop mindless consumption. We use the same material to wrap and bake food and drink unhealthy drinks as we do to build airplanes. We use plastic for use cases that take place over seconds and minutes and then throw it away. We drive everywhere because of poor urban design. We use plastic to carry food home from stores and restaurants. We fill our homes with plastic, metal, wood, and electronic junk, very little of it actually needed.
Mindless consumption makes the U.S. waste 1/3 of the food produced every year. 96% of that goes directly into landfills. It is literally throwing energy away, energy that we sapped away from the ground and ecosystems. Only 4% of the waste is composted. Full adoption of composting food waste and reducing it in total could bring emissions down by as much as high single digits or low teens percentages.
We also need greater wealth equality, which brings education and health equality as well.
It's almost silly how simple the real solutions are.
I planted milkweed last year, or rather let the milkweed that the previous owner would put mulch over. Surprise, we have monarch caterpillars this year.
There are real consequences to our actions, and if we reverse them, we get real consequences back.