There are a couple barriers: What would you do with the CO2? Even if home CO2 capture was practical, sequestering CO2 gas is really hard. A lot of the best ch

There are a couple barriers: What would you do with the CO2? Even if home CO2 capture was practical, sequestering CO2 gas is really hard. A lot of the best chemicals for capturing carbon are very corrosive and dangerous to work with. Your best bet would probably be making charcoal and burying it.