I do not understand the sentence at 3:15 in this video:
Growing animal feed means more land per calorie of food is needed to produce beef than broccoli.
Sorry I wanted to write more specific question but it's hard to explain cause I also don't know what exactly I don't understand in this sentence.
But first I feel like the part marked in bold is unnecessary because it means the same as the subject of this sentence, "Growing animal feed"? I feel like this sentence should end without the part and I don't know why.
And is "to produce" omitted after than? So is it like "to produce beef than to produce broccoli."? So does this sentence mean "When compared to producing broccoli, producing beef needs(requires) more land per calorie of food", and this whole sentence is what "Growing animal feed" means?
I don't get the structure and exact meaning of this sentence. Maybe I'm having difficulty understanding the role of "to ~" here. Can anyone help me with this?