For every ton of waste recycled, a city avoids paying for its disposal, which, in parts of New York, amounts to saving of more than ＄100 per ton.

我认为这个句子中，saving 需要改进。如果用作纯粹的名词，之前应加the，如果用作动名词，去掉后面的 of，改为：

For every ton of waste recycled, a city avoids paying for its disposal, which, in parts of New York, amounts to the saving of more than ＄100 per ton. （of more than ＄100 per ton 作 the saving 的定语）

For every ton of waste recycled, a city avoids paying for its disposal, which, in parts of New York, amounts to saving more than ＄100 per ton.（more than ＄100 per ton 作saving 的宾语）