In this section of CGTN's #ZeroWasteChallenge, we asked our four volunteers from four continents to tell us about the food culture where they are – and the answers were fascinating...

"There's little or no wastage of food in Nigeria," says Emmanuel Ojirhevwe, our #ZeroWasteChallenge volunteer in Lagos. "If we've cooked food, once we've taken the quantity we need, the rest goes back to the refrigerator to be warmed for another day."

Emmanuel says there isn't much of a restaurant culture in Nigeria – except perhaps among a certain section of the population. "I'd say the percentage of people eating in restaurants is maybe 30 percent. Most Nigerians who are single go to the restaurant, but those that are married tend to cook their own food. 

"When I wasn't married, I went out to canteens and restaurants to eat because I didn't really have time to prepare food for myself. But my wife has encouraged me in the area of cooking food – since I got married, I've not even gone out to the restaurant once."

Unlike in some societies, this also applies to special celebration meals, which also take place in the home. 

"If we have to celebrate a birthday, naming ceremonies, special visits, we don't really go out. Sometimes we just get drinks and cakes and things from the local markets and bring them home, we prepare them and eat them in the house."

This story is part of CGTN's #ZeroWasteChallenge as four people on four continents reveal how sustainable their country's culture is.