An alternative possibility is that 55 Cancri e is a solid planet made of carbon-rich material rather than the oxygen-rich material that makes up the terrestrial planets in our solar system.

Any materials rich in nitrogen vent off the excess as ammonia gas, unless some carbon-rich materials are present to combine with the nitrogen.

Comfrey should not be added in quantity as it will quickly break down into a dark sludgy liquid that needs to be balanced with more fibrous, carbon-rich material.

In the winter you may find you have too much kitchen waste and not enough carbon-rich material; use shredded paperwork from time to time.

Put differently, it shows that comets are heavenly vans carrying tons of carbon-rich materials from interstellar space to addresses throughout the solar system.

Resulting oxidation of sulphides produced enough heat to start fires in the carbon-rich material.

Fossilized organic matter such as oil shale and coal metamorphose over time with exposure to heat and pressure to release methane and leave behind more carbon-rich material.

A Trojan's spectrum can be matched to a mixture of water ice, a large amount of carbon-rich material (charcoal), and possibly magnesium-rich silicates.

Oil is a carbon-rich raw material, and plastics are large carbon-containing compounds.

Trace amounts of benzene may result whenever carbon-rich materials undergo incomplete combustion.