In addition, about 250 years ago humans began to burn copious amounts of fossil fuels. That added another 350 gigatons of CO2 to the atmosphere (half of which have been produced just since 1980). Total it all up and we’ve put some 850 gigatons of CO2 into the air. For now, the majority of CO2 humankind has released since the birth of civilization has come from plants and the soil.
- Quoted from Kiss the Ground: How the Food You Eat Can Reverse Climate Change, Heal Your Body & Ultimately Save Our World by Josh Tickell and John Mackey.