There is actually enough food on our planet, but the allocation is very unfair. The people in the 3. World must starve and we have too much food. There is a big famine in the 3. World.
But the question is - what can we do?
First step could be to buy fair food for example there is the project fairtrade which you could support. There are some oragnisations where you can support  the people there with clothes, food and other things which you don't need anymore.