六十年代中期,全世界粮食问题的严重性开始被学术界和政府所认识. L.R.布朗在《人类、土地和粮食》的文章中提到了2000年使人忧虑的粮食供应问题.第二次世界大战以前曾出口粮食的非洲、亚洲和拉丁美洲,现在越来越依靠进口粮食.许多发展中国家失去自己养活自己的能力.人们获得粮食有几种方法.第一,拥有土地的农民生产、交换或销售粮食.第二,购买.世界大 The severity of the world’s food problems began to be recognized by academics and governments in the mid-1960s, and LR Brown referred to the alarming food supply problem in his article Human, Land and Food for the year 2000. The Second World In Africa, Asia and Latin America, where food was exported before World War II, the country now relies more on imported food, many developing countries have lost their ability to feed themselves, and there are several ways for people to access food: First, peasants who own land exchange and produce Or sell food. Second, buy. The world is big