Answer:
<h2>To recap: currency evolved from barter, to bartering with set mediums of exchange, to coins representing exchangeable goods, to coins stamped in precious metal, to paper representing coins, to notes representing gold or silver, to being redeemable exclusively for gold, to the end of the gold standard.</h2>
Answer:
Once a year at the beginning of the calendar year usually.
Explanation:
The State of the Union Address (sometimes abbreviated to SOTU) is an annual message delivered by the president of the United States to the U.S. Congress near the beginning of each calendar year on the current condition of the nation.
Security in a free-market system is handled on two different levels: at the state level (which is public) and at the private level, in which private security firms are hired.
Well if you talking about solar energy sustainability
Bad
1, Pricing
2.Dangerous (building material wise)
Good
1. Better Ecosystem
2.it will help with our unstainable energy
http://www.foei.org/good-energy-bad-energy