Unfortunately, empirical data, good, hard stats, don't exist, and therefore to prove my point, I first of all had to find some proxy way of uncovering how much food was being wasted.
但是很可惜，实际、确凿的数据很难统计， 因此，为了证明我的观点，我首先得通过 一些替代的方式来揭露 有多少食物被浪费了。