Wasting food has become a big problem in the developed world. While some people there throw away unwanted food, people in other (part) of the world face food shortages. It's an (astonish) fact that a third of the world's food is wasted each year, which is enough (feed) a billion hungry people. Most of the wasted food (bury) in the landfill sites. (lucky), this causes greenhouse gases which eventually lead to global warming and climate change. In Denmark, a woman called Selina Juul has been working hard to deal with problem. She thinks people shouldn't waste food, rich they are. She persuaded some supermarkets to stop selling their goods (tie) together so that people bought only what they needed. Also, she produced a leftovers cookbook and set up an education program in schools, food waste was rather common. Now the effects are quite noticeable. Clearly, we need to think twice when we put something in our shopping basket, and we should make the most of the food we have—use up our leftovers or even share our extra food our friends and neighbors.