First we must make it clear that all the calculations presented below are approximate, but gives us an idea of the CO2 emissions you save by using solar energy or other renewable energy.

The equivalent ton of oil (toe) is the unit of energy most commonly used and which is used to make calculations and comparisons.

1 toe = 11.630 kWh = 41,868,000,000 joules

I.e., the amount of energy contained in a ton of oil is 11,630 kilowatt hours. With this data and other calculations comes to the following data:

1 Natural Gas Toe = 2.1 tons of CO2

1 Carbon Toe = 3.8 tons of CO2

1 Diesel Toe = 2.9 tons of CO2

With these data we can conclude for instance. If we build a solar power plant that produces 40,500 kWh per year, we would save 7.3 tons of carbon dioxide at no longer produce those watts in a carbon plant.

In simple words and numbers

1 kWh produced from natural gas emits 0.18 kg of CO2

1 kWh produced from coal emits 0.33 kg of CO2

1 kWh produced with Diesel emits 0.29 kg of CO2

1 kWh produced by the combination of all sources of renewable energy emits 0.04 kg of CO2

I am baffled by the last entry in this list. Is it correct that solar/renewable combo emits more CO2 than other conventional options? Can you explain how then you are suggesting that use of renewable replacing fossil fuel will reduce CO2(or equivalent) emissions?

n simple words and numbers

1 kWh produced from natural gas emits 0.18 kg of CO2

1 kWh produced from coal emits 0.33 kg of CO2

1 kWh produced with Diesel emits 0.29 kg of CO2

1 kWh produced by the combination of all sources of renewable energy emits 0.40 kg of CO2

Thank you for your comment, i was actually a typo

You can find the reviewed article in the following link

http://www.gstriatum.com/solarenergy/2009/03/how-much-co2-is-saved-with-solar-energy/

Regards

Solar Energy