Recently, the food issue has become the focus of society. The United Nations has issued warnings on many occasions, calling on all countries to deal with the coming food crisis. A total of 25 countries are facing severe hunger risks this year, and the world is on the verge of the worst food crisis in at least 50 years.
However, Chinese people do not need to worry about the food crisis.
Since 2010, my country's per capita food consumption has continued to be higher than the world average. In 2019, it exceeded 470 kg, which is far higher than the international food security standard of 400 kg per capita. Take the three major food rations-rice, wheat, and corn as examples. The domestic self-sufficiency rate of the three rations averages over 97%.
According to data from the Ministry of Agriculture and Rural Affairs, from 2019 to 2020, the total annual rice consumption is about 197 million tons, and the domestic annual output of rice is about 199 million tons;
The total annual domestic consumption of wheat is about 112 million tons, and the output is about 118 million tons. There is no import dependency on the three major rations.
Although the Chinese do not need to worry about food, we should also have crisis awareness in the face of food crises in other countries around the world. Pay attention to economy, eliminate food waste, control the amount of food at home, and order the right amount of food when you go out. If you can't finish it, you should also take it away.
However, after the food is packaged and returned home, it is necessary to change the utensils and heat before eating, or it can be heated directly in the packaging box, and the materials of the disposable packaging box should be treated differently.
Disposable tableware can be divided into three main categories: biodegradable (paper products, bamboo pulp, straw), easily recyclable materials (plastics), and easily reused (aluminum foils).
Today, we mainly talk about the classification of plastic food packaging
You will find that plastic food packaging produced by regular manufacturers will have different numbers at the bottom. What do they represent and how to use them without harming the human body?
No. 1: PET polyethylene terephthalate
Common mineral water bottles, carbonated beverage bottles, etc. High transparency, acid and alkali resistance, high water resistance, not easy to ooze. Heat-resistant to 70°C, it is easy to deform, and some harmful substances are melted out. No. 1 plastic product may release carcinogen DEHP after 10 months of use. Don't put it in the car to bask in the sun; don't put alcohol, oil and other substances. Throw it away when you use it up, not as a water cup.
No. 2: HDPE high density polyethylene
Common white medicine bottles, cleaning supplies, and bath products. Don't use it as a water cup or as a storage container for other items. If cleaning is not thorough, do not recycle. At present, most plastic bags used in supermarkets and shopping malls are made of this material. It can withstand a high temperature of 110 ℃, and the plastic bag marked for food can be used to hold food.
No. 3: PVC polyvinyl chloride
Common raincoats, building materials, plastic films, plastic boxes, etc. It has excellent plasticity and low price, so it is widely used. It can only heat up to 81℃. It is easy to produce bad substances at high temperatures and is rarely used in food packaging. Difficult to clean and easy to remain, do not recycle. Do not buy if it contains drinks.
No. 4: PE polyethylene
Common cling film, plastic film, etc. Harmful substances are produced at high temperatures, and toxic substances enter the human body with food, which may cause breast cancer, birth defects and other diseases in newborns. Do not put the plastic wrap into the microwave oven. The heat resistance is not strong, and the qualified PE cling film will melt when the temperature exceeds 110 ℃, leaving some plastic preparations that cannot be decomposed by the human body, and wrapping the food with cling film for heating, the oil in the food will easily cover the film Dissolve the harmful substances in it. Therefore, the food must be heated in a microwave oven before removing the plastic wrap.
No. 5: PP polypropylene
Common soy milk bottles, yogurt bottles, juice drink bottles, microwave lunch boxes. With a melting point of 167°C, it is the only plastic box that can be placed in a microwave oven and can be reused after careful cleaning. It should be noted that in some microwave oven lunch boxes, the box body is made of No. 5 PP, but the lid is made of No. 1 PE. Because PE cannot withstand high temperatures, it cannot be placed in the microwave together with the box.
No. 6: PS polystyrene
Common bowls of instant noodle boxes and fast food boxes. Do not put it in a microwave oven to avoid the release of chemicals due to high temperature. After loading acid (such as orange juice) and alkaline substances, carcinogens will be decomposed. Avoid using fast food boxes to pack hot food. Don't use the microwave to cook instant noodles.
No. 7: PC other types
Common kettles, space cups, and milk bottles. Department stores often use water cups of this kind as gifts. It is easy to release the toxic substance bisphenol A, which is harmful to the human body. Do not heat it when using it, and do not expose it to direct sunlight. The residual bisphenol A in PC, the higher the temperature, the more release and the faster the speed. Therefore, the PC water bottle should not be used to hold hot water. If your kettle number is 07, the following methods can reduce the risk: do not heat it when using it, and do not expose it to direct sunlight. Do not use a dishwasher or a dishwasher to clean the kettle. If the container has any fall or damage, it is recommended to stop using it, because if there are fine pits on the surface of the plastic product, it is easy to hide bacteria.
Source: Mobile Public Account
