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Forty-three percent of bread's greenhouse gas emissions can be attributed to the fertilizers used to grow wheat. Other processes, such as tilling the soil, irrigating, harvesting, and using electricity to power mills and bakeries, were also energy-intensive, but they did not amount to nearly as much as fertilizing.

Explanation:

Ultimately, the environmental impact depends on the production practices of the system used by farmers. Some of the environmental issues that are related to agriculture are climate change, deforestation, dead zones, genetic engineering, irrigation problems, pollutants, soil degradation, and waste.