Based on the information I was able to find I would say "Natural gases".
This is due to the reason it is burned to create heat for buildings which are used for several things we do daily such as cooking, heating, and electricity.
Answer: Bassically, certain gasses like CO2 (Carbon Dioxide) that come from stuff like burning fossil fuels and global warming, they heat up the earth, are wastes and are used as fuel.
The ancient Egyptian noblemen usually would be very busy with their daily appointments with overseers of their much treasured land. However, music played a vital role in their lives. To pass time, they threw lavish parties. Consumption of beer, wine, and narcotics was common.
They also spent their leisure time in their own gardens next to their houses like people do today. They could go outside and relax. They also loved to over-stuff themselves and enjoy a good laugh. Fishing was also done at their free time and would go severally to river Nile. Most of the fishing was enjoyed as a timeout from hard work. They also hunted for sport. Noblemen caught wild animals.
