Not much different from today. Coal.
lighting is enegry do to it bolt.
They get enegry by giant clouds of dust called nebulae.
i think it is nucler enegry A limiting factor for using nuclear enegry is the what it produces is enegry transformation.
High enegry sugars!
Electrical enegry or elecrical engry.
enegry
The process is called cellular respiration. It takes place in mitochondria
solar energy
sunlight
yes it does
this question doesn't make any sense :)
Hydroelectric