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Hi,
Steel can be recycled, or it will decay back into the earth. Plutonium cannot.
The main idea of Cradle to Cradle is that there are biological nutrients, and there are technical nutrients; both of which can be truly recycled back into at least equal quality material. Obviously, biological nutrients do this on their own; while technical nutrients have to be processed.
The problems arise when these get mingled, making it hard/impossible to separate them. And worst of all are materials that cannot even fit into the technical nutrient category: PVC, heavy metals, and plutonium are examples of these.
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Are some of you suggesting that humans have not contributed to, or at least tipped the balance on global climate change? C'mon! All the "science" that questions this has been bought and paid for by Exxon Mobil et al.
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