Kömür, doğal gaz ve petrol, milyonlarca yıl önce yaşamış bitki ve hayvanların kalıntılarıdır.
- Coal, natural gas and oil are the remains of plants and animals that lived millions of years ago.
Bu araba doğal gazla çalışır.
- This car runs on natural gas.
Natural-gas prices.
... from 40 to American natural gas ...
... policies. Mr. President, all of the increase in natural gas and oil has happened on private ...