"Potassium is a necessary ingredient of the fertilizer required to feed a growing world population. Accordingly, prices and corporate profits have soared to unprecedented levels in recent decades. While other countries such as Saudi Arabia and Norway have taken steps to capture the value of...

"An integrated ethnoarchaeological and archaeological investigation of the Afar salt route in and around the early Aksumite State in the Horn of Africa that explores the relationships between the fringes of the Aksumite polity and core power structures."

Purpose There is an increasing interest in visiting protected areas in the Algarve (Portugal). Tourists are interested in contact with nature activities. However, protected areas are quite sensitive to human pressure and are limited in their carrying capacity. The purpose of this study is to...