农业比狩猎和采集的人均粮食产量更高，因此人们能够抚养更多的孩子。
Farming produced more food per person than hunting and gathering, so people were able to raise more children.
人均粮食拥有量比三十年前还少。
Per capita food grain availability has shrunk to what it was three decades ago.
根据印度和美国的资料，印度的专家指出，美国人均粮食消耗量是印度的三到五倍。
Indian experts, citing data from here and from the United States, say American per capita food consumption is three to five times that of Indians.
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