Sustainable Atlanta Roundtable December 2008
This morning I went to Southface’s monthly Sustainable Atlanta Roundtable. Dr. Marilyn Brown was speaking about the advantages of energy efficiency in our homes versus the building of new coal powered plants. I have seen her speak before about shrinking the carbon footprint of urban areas and she is fascinating. I felt like sharing a few of the numbers she was throwing out. These are not in any type of order, just notes I had:
*1 incandescent lightbulb only uses 3% of the full potential that coal generates (in other words, using electricity to run a lightbulb is wasting 97% of it’s potential power). CFL’s (compact fluorescent lightbulbs) are 4 times more efficient.
*The residents of the state of Georgia could save $100,000,000 if every home switched their lightbulbs to CFL’s. (that’s assuming that the average home has 5 lightbulbs that are used for 5 hours each day). It also assumes that 30% of those lightbulbs have already been changed out.
*A plasma TV uses 250 watts per day versus a standard TV using 100 watts per day. Add on the cable box and that is an additional 25 watts. 2 plasmas & two cable boxes use the same energy as a refrigerator; now that’s a lot of energy for something that is turned off for most of the day.
*Once Obama becomes president, his plan is to have a 15% reduction in electric use by 2020. His plan also calls for 10% of the countries energy supply to come from renewable sources by 2012 and 25% by 2025.