Human living environment amidst the spontaneous ท้เง natural and manmade. Which of these environmental benefits the human being in the top four factors, that is, as a source of food, housing, clothing and medicine.
Human lives are surrounded by metal Langen, spontaneous, natural and man-made. The environmental benefits of these human factors in the fourth. It is a source of food, shelter, clothing. And medicines
Humans live in the moment of environmental natural and man-made up. These are useful to humans in the environment, the four factors, which is a source of food, housing, clothing and medicine.