Number of the Day: 200

Refrigerator Energy Use Chart photo

200 -- amount of terawatt-hours saved annually by the gradual switch to more efficient refrigerators in the USA (see chart above).

80 -- roughly the number of extra power plants that the USA would need without these efficiency improvements.

7 -- that's the percentage of GDP that is spent on energy in the USA. Energy intensity per unit of GDP has been decreasing about about 2% per year in the USA, and about 1.5% per year overall on the planet.

The source of these numbers and more can be found in this very interesting article about energy efficiency: ::The elusive negawatt

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