Image
Coal, oil, gas
Carbon has been locked up in fossil fuels, built up from once-living things, for millions of years.
Acknowledgement: Public domain
Rights: Public domain
Published: 30 June 2010,Updated: 30 June 2010Size: 46.64 KBCarbon has been locked up in fossil fuels, built up from once-living things, for millions of years.
Acknowledgement: Public domain