Which Energy Sources Are the Dirtiest?

Estimated metric tons of carbon dioxide emission equivalents from generating one gigawatt-hour of electricity

A bar chart of the emissions resulting from each energy source generating the same amount of electricity, showing oil and natural gas to be the dirtiest energy sources after coal.

(Please use a modern browser to see the interactive version of this visualization)

Note: The chart shows the average emissions per gigawatt-hour of electricity over the life cycle of a power plant.

Source: Our World in Data aggregation of findings from scientific studies.