How many people are hungry in the world?

Since its establishment, the Food and Agriculture Organization of the United Nations has conducted five "World Food Surveys" from time to time.

The conclusion drawn from the data of these surveys is that instead of eliminating hunger, it is actually expanding.

The "First World Food Survey" in 1946 focused on 70 countries (accounting for 90% of the world's total population) from 1935 to 1939 before World War II. According to the "average daily caloric intake less than 2250

Kaiser defined malnutrition and concluded that approximately half of the world's population was malnourished. The "Second World Food Survey" in 1952 was based on 70 countries from 1946 to 1948 after the end of World War II.

As the object, the conclusion is that the overall nutritional level is lower than before the war, and all regions except North America, Europe, and Oceania have not reached the benchmark level in the "Third World Food Survey" in 1963, based on 1957 to 1959.

The fourth World Food Survey in 1977 analyzed data from 1972 to 1974 and expanded the scope of the survey to 162.

countries. The conclusion is that 455 million people in the world are undernourished, and 1/4 of the population in developing countries falls into this category. Malnutrition among children and women is especially serious from the perspective of the deterioration of the world's food situation.

, this is undoubtedly a warning. The results of the Fifth World Food Survey in 1986 were that 335 to 449 million people in 112 developing countries (excluding China and other socialist countries) were malnourished from 1979 to 1981.

The IMF claimed in the early 1980s that world grain production could feed 6 billion people. However, during the same period, the world's population was only about 4.5 billion, but 450 million people were hungry.

The number of hungry people increased to 1 billion. In 1972, due to two consecutive years of global food harvest failure caused by abnormal weather conditions, coupled with the massive rush to buy grain by the former Soviet Union, a world food crisis occurred. The Food and Agriculture Organization of the United Nations announced in 1973 and 1974

In 2006, the first and second food conferences were held successively to draw the attention of the world, especially the third world, to food and agricultural production problems. However, the problem was not solved, and the world food situation became more serious.

In the 1980s, the world's food will still tend to be in short supply. The resolution of the Food and Agriculture Organization of the United Nations on World Food Day was made against the background of the increasingly acute contradiction between world food supply and demand. The Food and Agriculture Organization of the United Nations determined the theme of World Food Day in 1996.

In order to "fight hunger and malnutrition", it was designated as "Invest in Food Security" in 1997, with the purpose of mobilizing the world's power, increasing agricultural investment, and enhancing the effective supply of food. Many governments have organized "World Food Day" activities.

We attach great importance to it. Some heads of state deliver speeches on this day, some countries hold commemorative meetings and publish commemorative articles, and some national scientific research institutions publish scientific research results on food and agriculture and hold scientific seminars to raise people’s awareness of the importance of food and agriculture.

to promote the development of food, forestry, animal husbandry and fisheries. The theme of World Food Day 2009 is "Responding to Crisis and Achieving Food Security", which emphasizes the serious plight of malnutrition among 1.02 billion people around the world and the current situation.

The need to help hungry people in a depressed economic environment.

Since the 20th century, the world's population has been growing at a faster rate. Especially since World War II, the world's population has doubled every 37 years. Coupled with the need for rapid economic growth, food supply has come under unprecedented pressure.

Between 1955 and 1985, world food production more than doubled, but the area of ??cultivated land increased by only 15% during the same period.

These data illustrate two problems: First, the increase in grain production is not only due to the increase of cultivated land, but also through the excessive use of land; second, due to the excessive use of cultivated land, soil erosion and desertification have been caused, and in the end it cannot be achieved.

Do not give up part of the cultivated land.

The fertility of the land is maintained primarily through the intermittent fallow of the land to regenerate nutrients.

As population pressure increases, more food must be produced, and the area of ??fallow land must be reduced. Over time, the soil becomes increasingly poor and even loses its production capacity completely.

In order to increase land fertility, applying large amounts of inorganic fertilizers is one of the main technical means to increase grain production in the world today.

However, the harm of chemical fertilizers to the environment has been ignored.

All types of chemical fertilizers applied to farmland cannot be absorbed and utilized by plants.

The average utilization rate of chemical fertilizers for various crops is: nitrogen 40% to 50%; phosphorus 10% to 20%; potassium 30% to 50%.

Excess chemical fertilizers pose a great threat to the environment for human survival.

1. Chemical fertilizers pollute water bodies. One of the most serious consequences of excessive nitrogen, phosphorus and other nutrients is the eutrophication of water bodies.

Eutrophication of water bodies is a natural process of water body aging, but chemical fertilizers greatly accelerate this process.

Another serious consequence is the contamination of groundwater.

Nitrates and nitrites in chemical fertilizers move with water flow in the soil, or pass through the soil layer into groundwater.