edit: 20 kg of CO2, not 20 tons. This system proposes removing 30 millions tons per year. A tree captures about 0.02 tons of carbon dioxide per year. So this

edit: 20 kg of CO2, not 20 tons. This system proposes removing 30 millions tons per year. A tree captures about 0.02 tons of carbon dioxide per year. So this is the equivalent to 1.5 billion trees. Trees grow at about 800 trees per acre. This effectively matches the space of 1.875 million acres, around 2,929 square miles. So in a way one could think of this as opening up more land for other things.