Climate change, specifically global warming, has already significantly reduced the crop yields in a number of countries. This reduction of crop yield has been so substantial that it has become a factor in the increase of food prices, a concern that has hit countries worldwide.
In Russia, yield on wheat crops has been reduced by over 10%. Countries like China, India and France have also experienced reduced yields on wheat by a few percentages. In China, France and Brazil, yields on corn were also reduced by several percentages. This information was included in the study and was focused between the years 1980 until 2008.
The study also concluded that despite the significant loss of yield on crops in some countries, there have been those that have gained some positive effects because of climate change. For instance, in countries that were primarily agricultural, the excess carbon dioxide in the air served as a fertilizer that helped cultivate plants. This effect somehow offset the negative effects that the same greenhouse gas has dealt other countries.
However, if the gains will be compared to the losses that global warming has brought, it can be concluded that the gains do not make up for the losses. Justin Costa-Roberts and David Lobell, authors of the study, pointed out that there is a high possibility of this global temperature rise to increase even more in the years to come. This will also ultimately lead to a worsening of its impact on food production.