They are no renewable
You can't just go to the store and say "I want some land and air"
And the water is important because if we pollute it, we have no drinking water
I believe its true but if not , my mistake
D. Religion spreading through the Silk Road.
Money emerged out of the barter economy when goldsmiths kept gold for people and gave them receipts instead. The receipts became the "money".
In the 1600s, a lot of London merchants would place their gold in locked storage rooms of the goldsmiths in the city for preservation; the goldsmiths would give receipts to the merchants. The receipts could also be cashed in for gold, which had real value.
