Don't judge a carrot by its wonkiness.

Is bigger always better? The people running most cafés, restaurants and supermarkets seem to think so, serving or selling larger portions of food. This trend and portion sizes keep growing in the United States and Europe.

Throwing out food scraps and leftovers hardly seems controversial until you consider the stats: Some 870 million people, one-in-eight on Earth, go to bed hungry every night, notes the World Food Programme.

Food waste is a monumental problem. Here are some simple ways to fight it.