Why are there still famines?

The United Nations says the world is facing its biggest humanitarian crisis since the end of World War Two. A famine has already been declared in parts of South Sudan. There have also been warnings of possible famine in north-east Nigeria, Somalia and Yemen. The UN says in all nearly 20 million people are at risk of starvation. Why are there still famines and what can be done about it? UN agencies

[kazutox]

国連、南スーダンに6年ぶりに飢餓宣言、その他3か国・地域に警告