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The environment was the focus of NBC's weekending Making a Difference feature and ABC's preview of a National Geographic cable documentary hosted by its own Elizabeth Vargas. NBC's Roger O'Neil visited the sustainable mozzarella farm of the Crave brothers in Wisconsin. The manure their cows produce is converted into methane which powers the generator that runs their milking machines leaving a residue that is used as "odor free potting soil and a new liquid fertilizer." Vargas' documentary is called The Human Footprint and it dramatizes the resources that Americans use in water and wood and oil and so on: "If everyone else lived like we do we would need four planets to supply the resources and store the massive amount of waste." Disposable diapers, for example, use so much pulp and oil that "an American at the age of one already has a bigger carbon footprint than a Tanzanian will have in a lifetime."
