I have found out through my research that replacing invasive species and lawns with native plants and also composting organic waste, leaves, and twigs and returning that to your lawn are two of the best things a single person or group of persons can do to thwart climate change. Organic material decomposing in landfills generates methane, which is 26 times more potent than carbon dioxide in terms of its greenhouse effects. Composting organic material generates much, much less methane, and you can use it to return sustenance back to your soil. Instead of taking twigs and leaves and removing it from your property, you can compost them as well and return it back to the soil or also just leave the leaves in some cases. Planting native plants is a big win all around, from soil conditions, to using less or no water or fertilizer, to improving wildlife and pollinator conditions. Additionally, replacing lawns, which should be viewed as wastelands and green deserts, with plants greatly increases carbon capture. These are things that nearly everyone can do literally right now. I've tried finding research, and my current knowledge is that composting could save as much as 8-10% of global emissions and restoring areas with native plants could save as much as 20-30% of global emissions.
A few specific references that I have been using are Nature's Best Hope by Douglas Tallamy, as well as his other books, and the Monarch Gardens project (https://www.monarchgard.com/) by Benjamin Vogt.
It blows my mind that people keep looking for technocratic solutions when we have solutions right in front of us that could be done right now. Take a look around next time you're driving around and just note all the lawn spaces sitting there and doing literally nothing. They could be replaced with native plants with zero negative impact, and it would do wonders for the local ecosystem.