Organizers say two million people marched in protest against seed giant Monsanto in hundreds of rallies across Canada, the U.S. and dozens of other countries on Saturday.
"March Against Monsanto" protesters say they wanted to call attention to the dangers posed by genetically modified food and the food giants that produce it. Founder and organizer Tami Canal said protests were held in 436 cities in 52 countries.
Genetically modified plants are grown from seeds that are engineered to resist insecticides and herbicides, add nutritional benefits or otherwise improve crop yields and increase the global food supply.
Most corn, soybean and cotton crops grown in the United States today have been genetically modified. But some say genetically modified organisms can lead to serious health conditions and harm the environment.