From the Seventh Generation dish washing liquid bottle's label:
"If every household in the US replaced just 1 bottle of 25oz petroleum-based dish washing liquid with our plant-derived product, we could save
86 000 barrels of oil - enough to heat & cool 4 900 US homes for a year!"
Now if only we had a dish washing product that works as well as this one- MADE IN SA! Imagine the miles I'd save. Eh Bernhard?!