chabal tetlh submission
coal
This submission has been accepted. No further
votes can be made on it.
Description
A flammable, carbon-rich mineral formed by the fossilization of plant matter under heat and pressure. Used as fuel by humans since ancient times, and on a massive scale since the Industrial Revolution. The largest source of human CO2 emissions.
Voter feedback
Downvote information
Each count is the number of voters who selected that reason.