基因工程能有积极的effect on the climate

Certain types of genetically modified crops -- such as GM maize and soybean -- are widely grown in other parts of the world, but hardly in Europe. "The main reasons are public acceptance issues and political hurdles," says Qaim.

In the new study, he and his colleagues from the Breakthrough Institute used global agricultural data and estimates of the yield effects of GM crops to model how increased technology adoption in the EU would affect production, land use, and greenhouse gas emissions. The estimates suggest that more widespread use of genetically modified crops in the EU could prevent the release of 33 million tons of CO2 equivalents, which corresponds to 7.5 percent of the EU's total annual greenhouse gas emissions from agriculture.

更高的收益率在欧盟全球效应

“这些积极的气候影响的属性utable to reduced land-use change," says Dr. Emma Kovak from the Breakthrough Institute, the study's first author. The conclusion of the research team: "The EU imports a lot of maize and soybean from Brazil, where the expansion of agricultural land contributes to tropical deforestation. Higher yields in the EU could reduce some of these imports and thus help preserve the Amazon rainforest."

The authors stress that in their analysis they only look at already-existing genetically modified crops. "New genomic breeding technologies are currently being used to develop a wide range of new crop applications that could lead to additional climate change mitigation and adaptation benefits in the future," says Matin Qaim. The agricultural economist is a member of the Transdisciplinary Research Area "Sustainable Futures" and Cluster of Excellence "PhenoRob -- Robotics and Phenotyping for Sustainable Crop Production" at the University of Bonn.