Someone who experienced it and was there when it happened
I think the one that happened as a result of muhammad's ali agriculture reform was : Focusing only on a cash crop can create food shortages and famine
By using crop only for commercial value only, the food would go to wherever the money is, not the one who need it
- a durable incandescent material
- elimination of air from the bulb a better vacuum
- a filament material of high resistance
