Think about it and don't forget that we're happy to have enough food when unfortunately it isn't the case for everybody in this world.

If you want to read or hear more about it look at these sites :

http://www.bbc.co.uk/worldclass/19903379

or

http://www.bbc.co.uk/worldservice/learningenglish/language/wordsinthenews/2012/10/121011_witn_world_hunger.shtml