Depends on whether or not you believe NREL, to wit: An average U.S. household uses 830 kilowatt-hours of electricity per month. On average,producing 1000 kWh

Depends on whether or not you believe NREL, to wit: An average U.S. household uses 830 kilowatt-hours of electricity per month. On average,producing 1000 kWh of electricity with solar power reduces emissions by nearly 8 pounds ofsulfur dioxide, 5 pounds of nitrogen oxides, and more than 1,400 pounds of carbon dioxide.During its projected 28 years of clean energy production, a rooftop system with 2-year paybackand meeting half of a household’s electricity use would avoid conventional electrical plantemissions of more than half a ton of sulfur dioxide, one-third a ton of nitrogen oxides, and 100tons of carbon dioxide. PV is clearly a wise energy investment with great environmental benefits! -- https://www.nrel.gov/docs/fy99osti/24619.pdf https://www.nrel.gov/docs/fy99osti/24619.pdf