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Abstract
The harnessing of fossil energy use and the accompanying emission of greenhouse gases (GHGs) has facilitated the most rapid and extensive accumulation of wealth in human history. However, as economists are well-aware, all activity carries a cost. Along with the extraction and refining costs associated with fossil fuel use, there are a host of measurable, local externalities, primarily related to the degradation of air and water quality, that manifest in short to medium run. The world community is also increasingly concerned with the potential long-run effects of GHGs accumulating in the atmosphere, changing atmospheric chemistry and the climatic system itself. Researches on the impacts of climate change suggest there could be profound changes to ecosystems around the globe threatening a wide variety of plant and animal life, catalyzing the expansion of vector-borne diseases and, among other things, disrupting food production systems. By the end of this century, the projected temperatures in the U.S were expected to increase one to four celsius, depended on emission scenarios and GCMs used. Perez et al. (2016) applied an integrated assessment model to analyze the likelihood of four representative pathways. We were more likely to face RCP 6.0 and RCP 8.5. According, the probability of exceeding 2 Celsius was very high(more than 88%). Increasing temperature and change in precipitation patterns through changes in the water cycle by increasing evaporation. It could result in more storms(risk of flooding), along with drying some lands(drought).The agricultural system is vulnerable to extreme weather, but this vulnerability subject to farmers adaption behavior and resources availability. This dissertation focus on the impact of climate change on crop yield, farmer's adoption behavior under different objective functions and resource sustainability.