For trade, humans overcame numerous obstacles--seas, deserts and mountains. First with rudimentary and then increasingly evolved means. By taming animals such as donkeys, horses and...
From the "Why Study Home Economics?" (1955); Two teenage girls learn how a knowledge of homemaking can contribute to the enrichment of life. They also...
It's possible to exploit wood resources while respecting the primary forest. Woodcutting is not necessarily harmful since, with time and means, wood is a renewable...
