And, coal is also one of the most abundant energysources in the entire world.
另外，煤还是全世界最丰富的能源资源。
2
The problem now is not that the world is running out of energy but that the new sources of energy are more expensive to exploit.
现在的问题并非世界已无能源可采，而是开采新能源变得更昂贵了。
3
He is also a strong advocate of research into nuclear power and foresees a world in which fossil fuels are largely replaced by other sources of energy.