Did you know there is more carbon in earth’s soil than there is in the whole atmosphere and all of plant life combined? That’s 2.5 trillion tons of carbon, or 75% of the carbon on land. Many climate scientists believe that soil could help reverse climate change by absorbing and sequestering carbon. That’s because when plants engage in photosynthesis, they exchange oxygen for carbon dioxide. Much of this carbon is then stored in plant tissue. When an animal excretes a plant or a plant dies, the carbon soaks into the soil, which is also known as a carbon sink. But these natural carbon sinks are in danger. The pesticides and fertilizers used in conventional agriculture have reduced the rich, organic matter in soil from 6% to 1%, making it far less efficient in sequestering carbon. By purchasing more organic produce, you can support sustainable farm practices and help to diminish the greenhouse effect.