Photo Credit: (c) The European Commission Joint Research Centre Institute for Environment and Sustainability
Currently, carbon emissions battle terrestrial carbon sinks for first place as the leading cause of climate change (6). The battle continues to escalate with the discovery of natural terrestrial carbon sinks all over the globe by NASA satellites (6). Natural terrestrial carbon sinks accumulate on land instead of being absorbed by plants or the atmosphere (2). If disturbed, the collections of carbon will spike the level of carbon dioxide in the atmosphere as well as global warming (6). With growing human populations and areas of arable land now home to natural carbon sinks, producing enough food to feed the world poses a challenge (6). Human populations must now consider other methods of producing food that not only decreases carbon output into the atmosphere, but is sustainable, ecologically/regionally appropriate, and replenishes carbon into the earth’s soil and water systems.
As the human population exponentially grows it is crucial for survival to develop more sustainable systems for food production. Cuba stands out as a country with strong government support for organic agriculture (5). The collapse of the Soviet Union interrupted the influx of pesticides and fossil fuels which Cuba relied heavily upon for agriculture which forced Cuba to rethink it’s production from an organic standpoint (5). As Cuba embraced organic farming agriculture became the leading industry (5). All over Havana crops are grown on abandoned lots and rooftops (5). Cuba’s tropical climate does provide an environment that is easier to use organic farming techniques than other more harsh climates in the world, but much can be gleaned from the Cuban model. With the ever increasing risk of excessive carbon being released into the atmosphere from terrestrial carbon sinks, conventional, large scale, intensive farming is not a long term answer.
While farming areas with terrestrial carbon sinks presents the risk of releasing large amounts carbon, farming is possible and even suggested by environmental experts (1). Various methods are used for farming carbon rich land including conservation tillage, no-till farming , agroforestry, and the use of cover crops such as lentils or clover (1). These methods are intended to disturb the carbon rich soil as little as possible. In the instance of conservation tillage, farmers leave crop residue on the field which acts as a protective barrier (1). With no-till farming soil is left undisturbed despite growing crops on a particular plot (1). Agroforestry combines shrubs and trees with traditional crops to enrich the soil and prevent soil erosion (1, 3). Although these tactics can contribute to the carbon cycle, they also help create richer soil by replenishing nutrients as well as prevent soil erosion (3). These alternate methods of farming work with the land to replenish organic soil carbon, cut down on water pollution because the carbon under the surface acts as a bio-membrane (2). The most positive outcome of using these farming practices in many underdeveloped and developing countries is the ability to create more food for their population, making a particular country self sustaining, and guaranteeing the longer use of land for food production (3).
When considering environmental issues, one must also consider the economic cost of such actions. The Koyoto Protocol intended to reduce the negative economic impacts of carbon emissions with the creation of “Carbon credits” (4). The premise of a carbon credit is a country is given a greenhouse gas emission allowance that they can sell or trade, thus carbon credits have become a commodity in the world economy (4). By storing carbon, even natural terrestrial carbon sinks, many developing countries have the potential to earn an income by selling their carbon credits to businesses looking to lessen their carbon footprints (4). Farmers are getting in on the action too by offering up their land for storage which comes with the double benefit of helping to replenish soil and increase revenue (3, 4). The carbon business is booming.
The world has a diverse array of counties and the answers for producing food will be as diverse. Part of the solution needs to include people creating food locally in a sustainable fashion while replenishing the systems they tax for food production. With the growing population of natural terrestrial carbon sinks across the globe, the human population needs to start taking the precautions to guarantee food production will be able to continue without drastically changing the climate. It’s time for a sustainable future.
Works Cited
1. Govaerts, B. "Conservation Agriculture and Soil Carbon Sequestration: Between Myth and Farmer Reality." Critical Reviews in Plant Sciences. no. 3 (2009): 97 - 122. 10.1080/07352680902776358 (accessed February 4, 2014).
2. Lal, R. "Soil Carbon Sequestration Impacts on Global Climate Change and Food Security." Science. no. 5677 (2004): 1623-1627. 10.1126/science.1097396 (accessed February 4, 2014).
3. Lal, R. "Soil Carbon Sequestration to Mitigate Climate Change and Advance Food Security." Soil Science. no. 12 (2007): 943-956. 10.1097/ss.0b013e31815cc498 (accessed February 4, 2014).
4. Lewandrowski, Jan. "Economics of Sequestering Carbon in the US Agricultural Sector." ERS Research Brief. (2004). http://www.ers.usda.gov/media/434180/tb1909_researchbrief_1_.pdf (accessed February 4, 2014).
5. Scialabba, Nadia. "Factors Influencing Organic Agriculture Policies with a Focus on Developing Countries."IFOAM 2000 Scientific Conference and Food and Agriculture Organization of the United Nations. : 28 - 31. http://www.fao.org.libproxy.lib.unc.edu/docs/eims/upload/230159/BaselSum-final.pdf (accessed February 26, 2014).
6. "Sink or Swim ." Nature. no. 331-332 (2013). 10.1038/504331b (accessed February 4, 2014).





