How man first learnt to use fire is still unknown, but it is known that even the most primitive man, centuries ago, found it to be of great service to him as it is to us today. Man, in his early days, did not cook his food. He ate everything raw, including meat and fish. But the discovery of fire changed his eating habits completely. He now learnt to cook his food; and, when he found that cooked food was more delicious, fire became an important thing in his life. But fire has to be kept under strict control, for its capacity to destroy his great. Once it is out of control, it will destroy life and property at tremendous speed and the world has lost things worth millions of dollars because of fire.h