A crash course in changing the world.
This current world, the solar power is attracting much attention. Some country are selling the solar cells, but poor people can' buy the solar cells. In addition, the solar cell's cost is too expensive. I think the thing that can do with sunlight without the solar cell, and I have an idea the can do it. It's when we heat the food. We can heat by oven or stove, but the poor people can't have it. Poor people have to cut the tree and they heat the food. If there is a mistake, their house can burn, but if they use the sunlight, the house won't heat. The sunlight has a very strong heat. If we put the metal, the heat will get hotter and hotter. The production method of the thing that can heat is first you need aluminum foil and board. Second make box that the sunlight can gather in one place. Third wrap the board in aluminum foil. It's easy to make it. You need to put the box outside. It's very easy.