請(qǐng)高手幫我分析一下以下幾個(gè)英語句子的意思與句子成分與其中的詞組.
1：A large amount of carbon dioxide that we put into the atmosphere every year comes from the process of making and eating food.
2:A cow has to be fed and raised on farmland.
3:Most of cow will not even be used for meat that people eat.
4:Since Americans eat twice as much beef as is advised by US Department of Agriculture.
5:At least in terms of the amount of greenhouse gases released.