Soon, soybeans will be bred to yield stable oil without the addition of dangerous trans fats. Lettuce will be grown to handle warmer, drier fields. Wheat to contain less gluten. And pigs bred to resist deadly viruses. Ten years ago, such genetic changes would have been considered science fiction - or so far off into the future of breeding as to be almost unimaginable. But gene editing, particularly with a tool called Crispr-Cas9, has made it much easier and more efficient to tinker with the genomes of plants and animals. The first Crispr-edited products will begin reaching the market this year, and researchers believe it's only a matter of time before US grocery shelves could be filled with gene-edited produce, grains and meat. The technology will be subject to stringent health and environment review, as well as labeling requirements in the EU, but not in the US. The US Department of Agriculture (USDA) issued a statement last March saying it would not regulate crops whose genetic changes could have been produced with conventional breeding. The European court of justice, by contrast, ruled last summer that gene-edited crops should be regulated as GMOs. The scientific challenges have been largely settled. But political and social ones remain. Jennifer Kuzma, co-director of the Genetic Engineering and Society Center at North Carolina State University, said US consumers are willing to pay 20% more to avoid GMO foods, and nearly half of the public reports actively avoiding genetically modified ingredients and food.