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Because of climate change droughts will occur with greater frequency |
We can no longer deny the adverse
effects of global warming, especially the effect on food security and
agriculture. Climate change leads to changes in weather patterns,
including increased occurrences of drought, flooding, and insect
infestations. This spells out bad news for feeding the world's
growing population because crop yields will drop significantly.
Ironically, conventional agriculture contributes about 30% of
greenhouse gasses, making agriculture a significant contributor to
climate change. The bulk of the gasses is not emitted through
operating tractors or other machinery, but through the use of
petroleum in fertilizers and pesticides. According to an article
written by Anna Lappe, synthetic nitrogen fertilizer releases large
amounts of nitrous oxide, a primary threat to the ozone layer, into
the atmosphere. This may be reason enough to highlight organic
agriculture as a powerful tool to decrease greenhouse gas emissions,
but there are many other ways that organic farming methods contribute
to mitigating the adverse global warming.
NO2: (nitrous oxide):
Because of methods like crop rotation, which alternates the planting
of legumes with regular crops, the soil is rich with nitrogen and
less escapes to the atmosphere because of the improvement in soil
structure. Organic agriculture soil is also more aerated, and have
lower free nitrogen concentrations.
CH4: (methane) Biomass isn't burned,
so this gas isn't released into the air. However, some scientists argue that organic farming requires more cows so more methane released. More research is being done in bio gas and composting as a method to lower methane gas.
CO2: (carbon dioxide) In a study conducted by
the Rodale Institute over almost 20 years, finding showed that
organic farming promotes carbon sequestering, or the removal of
carbon gasses from the atmosphere and storing in the soil. Organic
farming is built on the principle of incorporating more organic
matter like mulch and manure into the soil, the soil's ability to
absorb carbon increases. This means that organic farming fields have
the ability to absorb carbon and hold them in the earth, instead of
escaping as gasses and depleting the ozone layer.
Eating organic is more than just healthy. It's a system that can help create global change and help tackle the most pressing issues, including ones as big and seemingly irreversible as climate change.
Resources:
http://www.twnside.org.sg/title2/susagri/2010/susagri125.htm
https://www.fibl-shop.org/shop/pdf/mb-1500-climate-change.pdf
http://www.thinkgreenliveclean.com/2010/05/can-organic-farming-end-global-warming/
http://www.compassnaturalmarketing.com/2010/09/17/organic-agriculture-a-cool-solution-to-global-warming/
http://www.rodaleinstitute.org/ob_31