Who is threatening world food security?

Who is threatening world food security?
According to Russian media reports on the 6th, during the evacuation of Marpol, the Ukrainian army set fire to the port warehouse where a large amount of grain was stored. The video shows that a large number of grains were scattered on the ground of the granary, and many places were charred and rotted, and these grains could not even be used as feed. , The warehouse can hold more than 50,000 tons of grain, and the port of Mariupol stores a large amount of grain and grain, including corn and wheat. It is reported that in addition to the burning of grain incident, the Ukrainian army had previously arranged water in the Black Sea to prevent ships from Grain is shipped to world markets.
Putin said a few days ago that Russia did not stop Ukraine's grain exports, and he urged Ukraine to clear mines in areas under its control so that grain could be shipped out