1. Climate conditions are different all over the world, and some areas can't be cultivated at all, resulting in a serious shortage of food production and an excessive number of hungry people. Take Africa as an example. A large area of tropical desert, savanna and rainforest climate makes many areas in Africa unsuitable for planting at all, resulting in a very small area of cultivated land in Africa. If you want to get rid of hunger, you can only accept assistance from other countries, but this can only be temporarily alleviated, not a long-term solution. After all, the population of other countries is increasing, and few countries are willing to provide free financial assistance.

Secondly, the world population is growing too fast, the arable land is decreasing day by day, and there is not enough porridge to eat, which will inevitably lead to uneven proportion. With the economic development of various countries, a large number of cultivated land has been requisitioned for construction, and the cultivated land area has decreased rapidly. On the contrary, the population has increased, reaching a new high every year. The cultivated land area in many countries has seriously exceeded the minimum line, and self-sufficiency is ok, but if it reaches the global level on average, it is somewhat insufficient.

Secondly, after this epidemic, the global economy suffered an unprecedented blow, and the trade between countries was greatly reduced. The epidemic has led to a serious reduction in grain production in some major grain importing countries. In addition, the number of poor people in poor countries has increased and the amount of food is small. The rise in food prices has caused more people to be unable to afford food. This is mainly related to the uneven economic development of various countries, but even if there is humanitarian assistance from other countries, it is difficult to develop because of the influence of its own climate, transportation, humanities and history.

There are constant wars in various places and regional conflicts, and it is difficult for many people to find food in the war. Now the overall situation in the world is stable, but some areas are still turbulent, just like the turbulent areas in the Middle East. The war left many people homeless and wandering around. They didn't get food in the war, but they suffered from hunger. So these people naturally become hungry people, which is difficult to solve, because other countries have no right to interfere in a country's political problems.