A new study conducted by a team of scientists of the Potsdam Institute for Climate Impact Research (PIK) shared to Database has discovered that global warming could create substantial economic damage in agriculture worldwide, as climate change threatens agricultural productivity, forcing up food prices.
“While financial gains and losses differ between consumers and producers across the regions, the bottom line is that consumers, in general, will likely have to pay more for the same basket of food,” the PIK study said. Researchers at PIK said additional expenditure for consumers outweighs producers’ gains, and increasing net economic losses will occur in the agriculture and food sector toward the end of the century. However, economic losses could be limited to 0.3 percent of global GDP —depending on agricultural trade policies, they said.
“Agriculture is very sensitive to climate change—even a small increase of global mean temperatures can have significant effects on regional crop yields, affecting both the profitability of agricultural production and the share of income spent on food,” PIK lead author-researcher Miodrag Stevanović said.
“Our study quantifies economic impacts and analyzes the role of international trade as an adaptation measure. We find that economic losses in agriculture could add up to the annual amount of roughly 0.8 percent of global GDP at the end of the century with a very restricted trade regime,” Stevanovic pointed out. He said although this percentage sounds small, it actually translates to losses of $2.5 trillion and is comparably higher for regions with limited agricultural resources with respect to growing agricultural demand, for example, the Middle East, Africa and India.
“In contrast, further trade liberalization in agricultural commodities could reduce financial damage globally by 65 percent, to 0.3 percent of global GDP,” the expert said.
“Both global warming and free trade favor northern regions like Europe and the US, since producers’ gains increase as trade patterns shift northward. At the same time, southern regions like Africa or India could theoretically reduce climate-change-related damages by half through more liberalized food markets,” co-author Alexander Popp explained.
He argued: “Irrespective of our assumptions on global trade, climate change will result in reduced crop yields in many areas. At the same time, intensifying production or expanding cultivated land into previously untouched areas may come at a risk: it could lead to additional greenhouse-gas emissions through tropical deforestation or increased fertilizer use. This could then further enhance climate- change pressure on agriculture.”
The researchers combined 19 different climate projections with simulations of crop growth to assess economic impacts of climate change in the agricultural sector. While the magnitude of damage varies with different assumptions on crop-productivity response to climate change, CO2 plant fertilization affect socio-economic projection. The PIK study highlighted the important role of trade as a key measure to partly reduce climate-change impacts.
If food prices increase due to climate-change impacts, households will not only have to spend more on their food consumption, but could also face risks of insufficient access to food and malnutrition.
“The best way to avoid these risks is to limit climate change. However, for impacts that cannot be avoided, an open and diversified trade system can be an important adaptation option. It can account for changes in global patterns of agricultural productivity and, thus, allow for reducing production costs and enhancing food security,” said Hermann Lotze-Campen, chairman of PIK’s research domain Climate Impacts and Vulnerabilities.
“As climate change will have an amplifying effect on the gap between developed and developing countries, reductions in trade barriers will have to be accompanied by measures for poverty reduction and social safety nets,” Lotze-Campen concluded.
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