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The Green Energy calculator will help you decide how many “blocks” to purchase per month by calculating the environmental benefit of your purchase in terms of carbon emissions reduced, at any level you choose.  

Another way to make this decision is to call LG&E or KU customer service and inquire about the "average monthly kilowatt hours (kWh) of electricity" you use. If you use an average of 1,000 kWh of electricity each month, and you want to reduce carbon emissions equal to that of your usage, you would enroll in Green Energy for $5 per month.

Residential and Business Green Energy Calculator

Large Commercial and Industrial Green Energy Calculator