1, shopping is smarter. The purchase of fruits and vegetables is the largest and the waste is the largest. It is recommended to buy fruits and vegetables in moderation, enough for a week, to avoid rotting for too long.

2. Make a shopping list. More than half of the things people buy in the supermarket are impulse purchases. Plan ahead and buy only what is on the list.

3. Don't buy in large quantities. The study found that considering the shelf life of food and other factors, medium packaging is the best choice for most families.

4. Buy only local food. Generally speaking, the shorter the mileage of food transportation, the less pollution it produces. Generally, local farmers' markets can buy locally produced fresh agricultural products.

Extended data:

Reasons for reducing food waste:

1. The contribution of reducing food loss and waste to reducing greenhouse gas emissions is often overlooked. By reducing food loss and waste, both public and private sectors can save costs, reduce hunger and cope with climate change.

Reducing food loss and waste can also save water resources. About 70% of the world's fresh water resources are used for agricultural production, and wasting food is equivalent to wasting a lot of water resources, which will aggravate the increasingly severe water shortage challenge. The increasing population and the increasing demand for land for agriculture and animal husbandry have also brought great pressure on land resources. Reducing food waste will also ease the pressure on land demand.