Build topsoil. Fix creeks. Eat meat from pasture-raised animals. 
Right now, the only possibility of large-scale removal of greenhouse gases from the atmosphere is through plant photosynthesis and related land-based carbon sequestration activities. These include a range of already existing, low- tech, and proven practices: composting, no-till farming, climate-friendly livestock practices, conserving natural habitat, restoring degraded watersheds and rangelands, increasing biodiversity, and producing local food.
In Grass, Soil, Hope, the author shows how practical strategies can be bundled together into an economic and ecological whole, with the aim of reducing atmospheric CO₂ while producing substantial co- benefits for all living things.
It's available through Chelsea Green Publishing