Kömür ve doğal gaz doğal yakıtlardır.
- Coal and natural gas are natural fuels.
Hidroelektrik yenilenebilir bir kaynaktır ama petrol, kömür ve doğal gaz değil.
- Hydropower is a renewable resource, but oil, coal and natural gas are not.
Natural-gas prices.
... the American people believe that. I will fight for oil, coal and natural gas. And the proof, ...
... policies. Mr. President, all of the increase in natural gas and oil has happened on private ...