tonight, the head of the world food program is warning that russia's invasion is devastating ukraine's wheat crop, putting millions of people around the world at risk of hunger. ukraine provides wheat to many countries. it is known as the breadbasket of the world. more tonight from cnn's hala gorani on what the war is doing to ukraine's wheat and other crops. >> reporter: on this farm in western ukraine and many like it across this country the future of food security for hundreds of millions of people around the world is being determined. one third of the world's most fertile soil is in ukraine, according to the u.n. so what doesn't grow here or what this country is unable to export because of the war, local officials tell me will cause ripple effects around the globe. the repercussions of the war in ukraine began to impact